perf: add initial cache-blocked dit fft impl

[smu160]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.29%. Comparing base (2e67b5c) to head (790861d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #48      +/-   ##
==========================================
+ Coverage   99.16%   99.29%   +0.12%     
==========================================
  Files          12       12              
  Lines        2167     2257      +90     
==========================================
+ Hits         2149     2241      +92     
+ Misses         18       16       -2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[Shnatsel]

Nice, I'm seeing up to 50%-ish improvements for larger sizes!

Timings on my Zen 4 CPU compared to main

 ~/C/PhastFT (feature/cache-blocked-dit-fft)> RUSTFLAGS='-C target-cpu=native' cargo bench --bench=bench PhastFT -- --baseline=main-native
   Compiling phastft v0.3.0 (/home/shnatsel/Code/PhastFT)
    Finished `bench` profile [optimized] target(s) in 21.79s
     Running benches/bench.rs (target/release/deps/bench-441a0f9fdf4ea83f)
Forward f32/PhastFT DIF/64
                        time:   [339.42 ns 339.55 ns 339.68 ns]
                        thrpt:  [188.41 Melem/s 188.48 Melem/s 188.56 Melem/s]
                 change:
                        time:   [+0.6950% +0.8077% +0.9117%] (p = 0.00 < 0.05)
                        thrpt:  [−0.9035% −0.8013% −0.6902%]
                        Change within noise threshold.
Found 10 outliers among 100 measurements (10.00%)
  2 (2.00%) low severe
  3 (3.00%) low mild
  1 (1.00%) high mild
  4 (4.00%) high severe
Forward f32/PhastFT DIT/64
                        time:   [144.77 ns 144.95 ns 145.15 ns]
                        thrpt:  [440.92 Melem/s 441.54 Melem/s 442.08 Melem/s]
                 change:
                        time:   [−2.7247% −2.4981% −2.2775%] (p = 0.00 < 0.05)
                        thrpt:  [+2.3306% +2.5621% +2.8010%]
                        Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
  1 (1.00%) high mild
  1 (1.00%) high severe
Forward f32/PhastFT DIF/128
                        time:   [562.97 ns 563.41 ns 564.09 ns]
                        thrpt:  [226.91 Melem/s 227.19 Melem/s 227.36 Melem/s]
                 change:
                        time:   [+0.4576% +0.5771% +0.6922%] (p = 0.00 < 0.05)
                        thrpt:  [−0.6874% −0.5738% −0.4555%]
                        Change within noise threshold.
Found 10 outliers among 100 measurements (10.00%)
  2 (2.00%) low mild
  2 (2.00%) high mild
  6 (6.00%) high severe
Forward f32/PhastFT DIT/128
                        time:   [203.33 ns 203.45 ns 203.58 ns]
                        thrpt:  [628.75 Melem/s 629.13 Melem/s 629.50 Melem/s]
                 change:
                        time:   [−1.0446% −0.9030% −0.7709%] (p = 0.00 < 0.05)
                        thrpt:  [+0.7769% +0.9112% +1.0556%]
                        Change within noise threshold.
Found 4 outliers among 100 measurements (4.00%)
  3 (3.00%) low mild
  1 (1.00%) high mild
Forward f32/PhastFT DIF/256
                        time:   [1.0058 µs 1.0063 µs 1.0067 µs]
                        thrpt:  [254.29 Melem/s 254.41 Melem/s 254.52 Melem/s]
                 change:
                        time:   [+0.8871% +0.9852% +1.0883%] (p = 0.00 < 0.05)
                        thrpt:  [−1.0766% −0.9756% −0.8793%]
                        Change within noise threshold.
Found 11 outliers among 100 measurements (11.00%)
  2 (2.00%) low severe
  4 (4.00%) low mild
  4 (4.00%) high mild
  1 (1.00%) high severe
Forward f32/PhastFT DIT/256
                        time:   [352.96 ns 353.27 ns 353.69 ns]
                        thrpt:  [723.81 Melem/s 724.65 Melem/s 725.30 Melem/s]
                 change:
                        time:   [−1.3792% −1.2210% −1.0586%] (p = 0.00 < 0.05)
                        thrpt:  [+1.0700% +1.2361% +1.3985%]
                        Performance has improved.
Found 8 outliers among 100 measurements (8.00%)
  2 (2.00%) low severe
  3 (3.00%) low mild
  3 (3.00%) high severe
Forward f32/PhastFT DIF/512
                        time:   [2.4369 µs 2.4377 µs 2.4386 µs]
                        thrpt:  [209.95 Melem/s 210.03 Melem/s 210.11 Melem/s]
                 change:
                        time:   [+2.2557% +2.3866% +2.4883%] (p = 0.00 < 0.05)
                        thrpt:  [−2.4279% −2.3309% −2.2059%]
                        Performance has regressed.
Found 18 outliers among 100 measurements (18.00%)
  6 (6.00%) low severe
  7 (7.00%) low mild
  3 (3.00%) high mild
  2 (2.00%) high severe
Forward f32/PhastFT DIT/512
                        time:   [1.2311 µs 1.2319 µs 1.2327 µs]
                        thrpt:  [415.36 Melem/s 415.61 Melem/s 415.90 Melem/s]
                 change:
                        time:   [+3.4294% +3.5799% +3.7491%] (p = 0.00 < 0.05)
                        thrpt:  [−3.6136% −3.4562% −3.3157%]
                        Performance has regressed.
Found 3 outliers among 100 measurements (3.00%)
  1 (1.00%) low severe
  2 (2.00%) low mild
Forward f32/PhastFT DIF/1024
                        time:   [5.6058 µs 5.6081 µs 5.6102 µs]
                        thrpt:  [182.52 Melem/s 182.59 Melem/s 182.67 Melem/s]
                 change:
                        time:   [−0.7163% −0.5525% −0.4069%] (p = 0.00 < 0.05)
                        thrpt:  [+0.4086% +0.5556% +0.7214%]
                        Change within noise threshold.
Found 3 outliers among 100 measurements (3.00%)
  2 (2.00%) low severe
  1 (1.00%) high mild
Forward f32/PhastFT DIT/1024
                        time:   [3.3746 µs 3.3774 µs 3.3799 µs]
                        thrpt:  [302.97 Melem/s 303.19 Melem/s 303.44 Melem/s]
                 change:
                        time:   [−0.4231% −0.2472% −0.0439%] (p = 0.01 < 0.05)
                        thrpt:  [+0.0439% +0.2478% +0.4249%]
                        Change within noise threshold.
Found 2 outliers among 100 measurements (2.00%)
  1 (1.00%) low severe
  1 (1.00%) low mild
Forward f32/PhastFT DIF/2048
                        time:   [7.4943 µs 7.4982 µs 7.5019 µs]
                        thrpt:  [273.00 Melem/s 273.13 Melem/s 273.27 Melem/s]
                 change:
                        time:   [+0.0561% +0.1807% +0.3186%] (p = 0.01 < 0.05)
                        thrpt:  [−0.3176% −0.1803% −0.0561%]
                        Change within noise threshold.
Found 8 outliers among 100 measurements (8.00%)
  2 (2.00%) low severe
  5 (5.00%) low mild
  1 (1.00%) high severe
Forward f32/PhastFT DIT/2048
                        time:   [3.0368 µs 3.0388 µs 3.0408 µs]
                        thrpt:  [673.51 Melem/s 673.94 Melem/s 674.39 Melem/s]
                 change:
                        time:   [+0.5840% +0.7395% +0.8884%] (p = 0.00 < 0.05)
                        thrpt:  [−0.8805% −0.7341% −0.5807%]
                        Change within noise threshold.
Found 9 outliers among 100 measurements (9.00%)
  5 (5.00%) low severe
  1 (1.00%) low mild
  3 (3.00%) high mild
Forward f32/PhastFT DIF/4096
                        time:   [15.293 µs 15.296 µs 15.299 µs]
                        thrpt:  [267.73 Melem/s 267.78 Melem/s 267.83 Melem/s]
                 change:
                        time:   [−0.1420% −0.0447% +0.0613%] (p = 0.42 > 0.05)
                        thrpt:  [−0.0612% +0.0447% +0.1422%]
                        No change in performance detected.
Found 10 outliers among 100 measurements (10.00%)
  3 (3.00%) low severe
  2 (2.00%) low mild
  2 (2.00%) high mild
  3 (3.00%) high severe
Forward f32/PhastFT DIT/4096
                        time:   [6.4379 µs 6.4424 µs 6.4472 µs]
                        thrpt:  [635.31 Melem/s 635.78 Melem/s 636.23 Melem/s]
                 change:
                        time:   [−2.5933% −2.4211% −2.2554%] (p = 0.00 < 0.05)
                        thrpt:  [+2.3074% +2.4812% +2.6623%]
                        Performance has improved.
Found 3 outliers among 100 measurements (3.00%)
  2 (2.00%) high mild
  1 (1.00%) high severe
Forward f32/PhastFT DIF/8192
                        time:   [31.799 µs 31.832 µs 31.874 µs]
                        thrpt:  [257.01 Melem/s 257.35 Melem/s 257.61 Melem/s]
                 change:
                        time:   [+2.7312% +3.2295% +3.7907%] (p = 0.00 < 0.05)
                        thrpt:  [−3.6523% −3.1284% −2.6586%]
                        Performance has regressed.
Found 9 outliers among 100 measurements (9.00%)
  5 (5.00%) high mild
  4 (4.00%) high severe
Forward f32/PhastFT DIT/8192
                        time:   [14.130 µs 14.165 µs 14.211 µs]
                        thrpt:  [576.45 Melem/s 578.32 Melem/s 579.77 Melem/s]
                 change:
                        time:   [+3.7590% +5.3473% +6.9516%] (p = 0.00 < 0.05)
                        thrpt:  [−6.4997% −5.0758% −3.6228%]
                        Performance has regressed.
Found 11 outliers among 100 measurements (11.00%)
  5 (5.00%) high mild
  6 (6.00%) high severe
Forward f32/PhastFT DIF/16384
                        time:   [81.974 µs 81.999 µs 82.024 µs]
                        thrpt:  [199.75 Melem/s 199.81 Melem/s 199.87 Melem/s]
                 change:
                        time:   [+0.1658% +0.2961% +0.4320%] (p = 0.00 < 0.05)
                        thrpt:  [−0.4301% −0.2952% −0.1655%]
                        Change within noise threshold.
Found 12 outliers among 100 measurements (12.00%)
  1 (1.00%) low severe
  4 (4.00%) high mild
  7 (7.00%) high severe
Forward f32/PhastFT DIT/16384
                        time:   [47.126 µs 47.163 µs 47.193 µs]
                        thrpt:  [347.17 Melem/s 347.39 Melem/s 347.66 Melem/s]
                 change:
                        time:   [−0.2829% −0.0058% +0.2918%] (p = 0.97 > 0.05)
                        thrpt:  [−0.2910% +0.0058% +0.2837%]
                        No change in performance detected.
Found 9 outliers among 100 measurements (9.00%)
  5 (5.00%) high mild
  4 (4.00%) high severe
Forward f32/PhastFT DIF/32768
                        time:   [196.72 µs 196.77 µs 196.83 µs]
                        thrpt:  [166.48 Melem/s 166.53 Melem/s 166.57 Melem/s]
                 change:
                        time:   [−0.2592% −0.1354% −0.0227%] (p = 0.02 < 0.05)
                        thrpt:  [+0.0227% +0.1356% +0.2598%]
                        Change within noise threshold.
Found 10 outliers among 100 measurements (10.00%)
  6 (6.00%) low severe
  2 (2.00%) high mild
  2 (2.00%) high severe
Forward f32/PhastFT DIT/32768
                        time:   [127.16 µs 127.22 µs 127.29 µs]
                        thrpt:  [257.43 Melem/s 257.57 Melem/s 257.69 Melem/s]
                 change:
                        time:   [+0.0022% +0.0950% +0.1956%] (p = 0.06 > 0.05)
                        thrpt:  [−0.1952% −0.0949% −0.0022%]
                        No change in performance detected.
Found 7 outliers among 100 measurements (7.00%)
  1 (1.00%) low mild
  5 (5.00%) high mild
  1 (1.00%) high severe
Forward f32/PhastFT DIF/65536
                        time:   [391.92 µs 392.00 µs 392.10 µs]
                        thrpt:  [167.14 Melem/s 167.18 Melem/s 167.22 Melem/s]
                 change:
                        time:   [+0.4627% +0.5909% +0.7463%] (p = 0.00 < 0.05)
                        thrpt:  [−0.7407% −0.5875% −0.4606%]
                        Change within noise threshold.
Found 10 outliers among 100 measurements (10.00%)
  4 (4.00%) high mild
  6 (6.00%) high severe
Forward f32/PhastFT DIT/65536
                        time:   [254.72 µs 254.79 µs 254.87 µs]
                        thrpt:  [257.13 Melem/s 257.21 Melem/s 257.29 Melem/s]
                 change:
                        time:   [+0.1791% +0.2679% +0.3588%] (p = 0.00 < 0.05)
                        thrpt:  [−0.3576% −0.2672% −0.1787%]
                        Change within noise threshold.
Found 8 outliers among 100 measurements (8.00%)
  1 (1.00%) low severe
  6 (6.00%) high mild
  1 (1.00%) high severe
Benchmarking Forward f32/PhastFT DIF/131072: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 7.1s, enable flat sampling, or reduce sample count to 50.
Forward f32/PhastFT DIF/131072
                        time:   [807.41 µs 807.72 µs 808.07 µs]
                        thrpt:  [162.20 Melem/s 162.27 Melem/s 162.34 Melem/s]
                 change:
                        time:   [−1.5557% −1.4330% −1.3095%] (p = 0.00 < 0.05)
                        thrpt:  [+1.3269% +1.4538% +1.5803%]
                        Performance has improved.
Found 6 outliers among 100 measurements (6.00%)
  2 (2.00%) low mild
  1 (1.00%) high mild
  3 (3.00%) high severe
Benchmarking Forward f32/PhastFT DIT/131072: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 5.8s, enable flat sampling, or reduce sample count to 60.
Forward f32/PhastFT DIT/131072
                        time:   [518.19 µs 518.56 µs 518.97 µs]
                        thrpt:  [252.56 Melem/s 252.76 Melem/s 252.94 Melem/s]
                 change:
                        time:   [−5.0240% −4.8492% −4.6837%] (p = 0.00 < 0.05)
                        thrpt:  [+4.9139% +5.0964% +5.2898%]
                        Performance has improved.
Found 1 outliers among 100 measurements (1.00%)
  1 (1.00%) high severe
Forward f32/PhastFT DIF/262144
                        time:   [1.6862 ms 1.6867 ms 1.6873 ms]
                        thrpt:  [155.37 Melem/s 155.42 Melem/s 155.46 Melem/s]
                 change:
                        time:   [−7.6713% −7.6351% −7.5954%] (p = 0.00 < 0.05)
                        thrpt:  [+8.2197% +8.2662% +8.3086%]
                        Performance has improved.
Found 7 outliers among 100 measurements (7.00%)
  5 (5.00%) high mild
  2 (2.00%) high severe
Forward f32/PhastFT DIT/262144
                        time:   [1.1354 ms 1.1357 ms 1.1360 ms]
                        thrpt:  [230.75 Melem/s 230.82 Melem/s 230.88 Melem/s]
                 change:
                        time:   [−10.081% −10.050% −10.017%] (p = 0.00 < 0.05)
                        thrpt:  [+11.133% +11.173% +11.212%]
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  3 (3.00%) high mild
  1 (1.00%) high severe
Forward f32/PhastFT DIF/524288
                        time:   [3.4092 ms 3.4100 ms 3.4109 ms]
                        thrpt:  [153.71 Melem/s 153.75 Melem/s 153.79 Melem/s]
                 change:
                        time:   [−4.5582% −4.5196% −4.4790%] (p = 0.00 < 0.05)
                        thrpt:  [+4.6890% +4.7335% +4.7759%]
                        Performance has improved.
Found 5 outliers among 100 measurements (5.00%)
  1 (1.00%) high mild
  4 (4.00%) high severe
Forward f32/PhastFT DIT/524288
                        time:   [2.2863 ms 2.2872 ms 2.2882 ms]
                        thrpt:  [229.13 Melem/s 229.23 Melem/s 229.32 Melem/s]
                 change:
                        time:   [−8.2517% −8.2025% −8.1531%] (p = 0.00 < 0.05)
                        thrpt:  [+8.8768% +8.9354% +8.9939%]
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  4 (4.00%) high mild
Forward f32/PhastFT DIF/1048576
                        time:   [6.7822 ms 6.7857 ms 6.7895 ms]
                        thrpt:  [154.44 Melem/s 154.53 Melem/s 154.61 Melem/s]
                 change:
                        time:   [−1.7416% −1.6847% −1.6161%] (p = 0.00 < 0.05)
                        thrpt:  [+1.6426% +1.7136% +1.7724%]
                        Performance has improved.
Found 10 outliers among 100 measurements (10.00%)
  2 (2.00%) high mild
  8 (8.00%) high severe
Forward f32/PhastFT DIT/1048576
                        time:   [4.9613 ms 4.9656 ms 4.9702 ms]
                        thrpt:  [210.97 Melem/s 211.17 Melem/s 211.35 Melem/s]
                 change:
                        time:   [−2.7503% −2.6339% −2.5081%] (p = 0.00 < 0.05)
                        thrpt:  [+2.5727% +2.7051% +2.8281%]
                        Performance has improved.
Found 7 outliers among 100 measurements (7.00%)
  4 (4.00%) high mild
  3 (3.00%) high severe
Forward f32/PhastFT DIF/2097152
                        time:   [15.318 ms 15.347 ms 15.376 ms]
                        thrpt:  [136.39 Melem/s 136.65 Melem/s 136.91 Melem/s]
                 change:
                        time:   [−5.6395% −5.4311% −5.2316%] (p = 0.00 < 0.05)
                        thrpt:  [+5.5204% +5.7430% +5.9766%]
                        Performance has improved.
Forward f32/PhastFT DIT/2097152
                        time:   [10.017 ms 10.027 ms 10.038 ms]
                        thrpt:  [208.91 Melem/s 209.16 Melem/s 209.35 Melem/s]
                 change:
                        time:   [−22.855% −22.669% −22.478%] (p = 0.00 < 0.05)
                        thrpt:  [+28.996% +29.315% +29.627%]
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  3 (3.00%) high mild
  1 (1.00%) high severe
Benchmarking Forward f32/PhastFT DIF/4194304: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 7.0s, or reduce sample count to 70.
Forward f32/PhastFT DIF/4194304
                        time:   [42.744 ms 43.108 ms 43.463 ms]
                        thrpt:  [96.503 Melem/s 97.297 Melem/s 98.126 Melem/s]
                 change:
                        time:   [+2.1913% +3.3255% +4.4422%] (p = 0.00 < 0.05)
                        thrpt:  [−4.2533% −3.2184% −2.1443%]
                        Performance has regressed.
Forward f32/PhastFT DIT/4194304
                        time:   [22.172 ms 22.298 ms 22.425 ms]
                        thrpt:  [187.04 Melem/s 188.11 Melem/s 189.17 Melem/s]
                 change:
                        time:   [−15.948% −14.892% −13.944%] (p = 0.00 < 0.05)
                        thrpt:  [+16.203% +17.498% +18.974%]
                        Performance has improved.
Found 7 outliers among 100 measurements (7.00%)
  2 (2.00%) low mild
  5 (5.00%) high mild
Benchmarking Forward f32/PhastFT DIF/8388608: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 16.7s, or reduce sample count to 20.
Forward f32/PhastFT DIF/8388608
                        time:   [88.698 ms 89.075 ms 89.480 ms]
                        thrpt:  [93.749 Melem/s 94.175 Melem/s 94.575 Melem/s]
                 change:
                        time:   [+1.1979% +1.8959% +2.6525%] (p = 0.00 < 0.05)
                        thrpt:  [−2.5840% −1.8606% −1.1837%]
                        Performance has regressed.
Found 11 outliers among 100 measurements (11.00%)
  3 (3.00%) high mild
  8 (8.00%) high severe
Benchmarking Forward f32/PhastFT DIT/8388608: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 11.5s, or reduce sample count to 40.
Forward f32/PhastFT DIT/8388608
                        time:   [46.965 ms 47.302 ms 47.670 ms]
                        thrpt:  [175.97 Melem/s 177.34 Melem/s 178.62 Melem/s]
                 change:
                        time:   [−31.683% −31.104% −30.480%] (p = 0.00 < 0.05)
                        thrpt:  [+43.843% +45.146% +46.377%]
                        Performance has improved.
Found 18 outliers among 100 measurements (18.00%)
  9 (9.00%) high mild
  9 (9.00%) high severe
Benchmarking Forward f32/PhastFT DIF/16777216: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 33.1s, or reduce sample count to 10.
Forward f32/PhastFT DIF/16777216
                        time:   [211.95 ms 212.44 ms 212.98 ms]
                        thrpt:  [78.773 Melem/s 78.975 Melem/s 79.155 Melem/s]
                 change:
                        time:   [−40.386% −40.207% −40.007%] (p = 0.00 < 0.05)
                        thrpt:  [+66.687% +67.243% +67.745%]
                        Performance has improved.
Found 11 outliers among 100 measurements (11.00%)
  5 (5.00%) high mild
  6 (6.00%) high severe
Benchmarking Forward f32/PhastFT DIT/16777216: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 22.6s, or reduce sample count to 20.
Forward f32/PhastFT DIT/16777216
                        time:   [106.91 ms 107.47 ms 108.07 ms]
                        thrpt:  [155.25 Melem/s 156.11 Melem/s 156.92 Melem/s]
                 change:
                        time:   [−36.347% −35.909% −35.484%] (p = 0.00 < 0.05)
                        thrpt:  [+54.999% +56.029% +57.103%]
                        Performance has improved.
Found 18 outliers among 100 measurements (18.00%)
  1 (1.00%) high mild
  17 (17.00%) high severe

Inverse f32/PhastFT DIF/64
                        time:   [351.88 ns 352.64 ns 353.41 ns]
                        thrpt:  [181.09 Melem/s 181.49 Melem/s 181.88 Melem/s]
                 change:
                        time:   [+0.4868% +0.7314% +0.9592%] (p = 0.00 < 0.05)
                        thrpt:  [−0.9501% −0.7261% −0.4845%]
                        Change within noise threshold.
Inverse f32/PhastFT DIT/64
                        time:   [158.70 ns 159.13 ns 159.48 ns]
                        thrpt:  [401.31 Melem/s 402.19 Melem/s 403.28 Melem/s]
                 change:
                        time:   [−3.1658% −2.8727% −2.6007%] (p = 0.00 < 0.05)
                        thrpt:  [+2.6702% +2.9577% +3.2692%]
                        Performance has improved.
Inverse f32/PhastFT DIF/128
                        time:   [580.18 ns 581.04 ns 582.00 ns]
                        thrpt:  [219.93 Melem/s 220.29 Melem/s 220.62 Melem/s]
                 change:
                        time:   [+1.0582% +1.2276% +1.3977%] (p = 0.00 < 0.05)
                        thrpt:  [−1.3784% −1.2127% −1.0471%]
                        Performance has regressed.
Found 4 outliers among 100 measurements (4.00%)
  1 (1.00%) low severe
  3 (3.00%) high mild
Inverse f32/PhastFT DIT/128
                        time:   [217.72 ns 217.98 ns 218.23 ns]
                        thrpt:  [586.54 Melem/s 587.22 Melem/s 587.90 Melem/s]
                 change:
                        time:   [−1.9278% −1.7934% −1.6562%] (p = 0.00 < 0.05)
                        thrpt:  [+1.6841% +1.8261% +1.9657%]
                        Performance has improved.
Found 1 outliers among 100 measurements (1.00%)
  1 (1.00%) low mild
Inverse f32/PhastFT DIF/256
                        time:   [1.0268 µs 1.0276 µs 1.0283 µs]
                        thrpt:  [248.95 Melem/s 249.13 Melem/s 249.31 Melem/s]
                 change:
                        time:   [+0.7134% +0.8500% +0.9855%] (p = 0.00 < 0.05)
                        thrpt:  [−0.9759% −0.8428% −0.7084%]
                        Change within noise threshold.
Found 3 outliers among 100 measurements (3.00%)
  1 (1.00%) low severe
  2 (2.00%) high mild
Inverse f32/PhastFT DIT/256
                        time:   [372.10 ns 372.33 ns 372.55 ns]
                        thrpt:  [687.15 Melem/s 687.57 Melem/s 688.00 Melem/s]
                 change:
                        time:   [−2.2687% −2.0901% −1.9016%] (p = 0.00 < 0.05)
                        thrpt:  [+1.9385% +2.1347% +2.3213%]
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  2 (2.00%) low severe
  1 (1.00%) low mild
  1 (1.00%) high mild
Inverse f32/PhastFT DIF/512
                        time:   [2.4736 µs 2.4743 µs 2.4751 µs]
                        thrpt:  [206.86 Melem/s 206.93 Melem/s 206.99 Melem/s]
                 change:
                        time:   [+1.7778% +1.9295% +2.0696%] (p = 0.00 < 0.05)
                        thrpt:  [−2.0277% −1.8930% −1.7468%]
                        Performance has regressed.
Found 10 outliers among 100 measurements (10.00%)
  5 (5.00%) low severe
  3 (3.00%) low mild
  2 (2.00%) high mild
Inverse f32/PhastFT DIT/512
                        time:   [1.2661 µs 1.2671 µs 1.2681 µs]
                        thrpt:  [403.76 Melem/s 404.06 Melem/s 404.39 Melem/s]
                 change:
                        time:   [+2.6088% +2.8298% +3.0546%] (p = 0.00 < 0.05)
                        thrpt:  [−2.9640% −2.7519% −2.5424%]
                        Performance has regressed.
Found 6 outliers among 100 measurements (6.00%)
  2 (2.00%) low severe
  3 (3.00%) low mild
  1 (1.00%) high severe
Inverse f32/PhastFT DIF/1024
                        time:   [5.7089 µs 5.7115 µs 5.7141 µs]
                        thrpt:  [179.21 Melem/s 179.29 Melem/s 179.37 Melem/s]
                 change:
                        time:   [−0.1948% −0.0526% +0.0927%] (p = 0.49 > 0.05)
                        thrpt:  [−0.0926% +0.0526% +0.1951%]
                        No change in performance detected.
Found 9 outliers among 100 measurements (9.00%)
  3 (3.00%) low severe
  3 (3.00%) low mild
  2 (2.00%) high mild
  1 (1.00%) high severe
Inverse f32/PhastFT DIT/1024
                        time:   [3.4640 µs 3.4671 µs 3.4698 µs]
                        thrpt:  [295.12 Melem/s 295.35 Melem/s 295.61 Melem/s]
                 change:
                        time:   [−0.5249% −0.3311% −0.1204%] (p = 0.00 < 0.05)
                        thrpt:  [+0.1205% +0.3322% +0.5277%]
                        Change within noise threshold.
Found 2 outliers among 100 measurements (2.00%)
  2 (2.00%) low severe
Inverse f32/PhastFT DIF/2048
                        time:   [7.6210 µs 7.6253 µs 7.6300 µs]
                        thrpt:  [268.41 Melem/s 268.58 Melem/s 268.73 Melem/s]
                 change:
                        time:   [−0.5306% −0.4029% −0.2759%] (p = 0.00 < 0.05)
                        thrpt:  [+0.2767% +0.4046% +0.5334%]
                        Change within noise threshold.
Found 3 outliers among 100 measurements (3.00%)
  2 (2.00%) low severe
  1 (1.00%) high severe
Inverse f32/PhastFT DIT/2048
                        time:   [3.2335 µs 3.2361 µs 3.2389 µs]
                        thrpt:  [632.32 Melem/s 632.86 Melem/s 633.37 Melem/s]
                 change:
                        time:   [+0.1676% +0.3779% +0.5730%] (p = 0.00 < 0.05)
                        thrpt:  [−0.5698% −0.3765% −0.1673%]
                        Change within noise threshold.
Found 10 outliers among 100 measurements (10.00%)
  4 (4.00%) low severe
  5 (5.00%) low mild
  1 (1.00%) high mild
Inverse f32/PhastFT DIF/4096
                        time:   [15.796 µs 15.802 µs 15.810 µs]
                        thrpt:  [259.07 Melem/s 259.20 Melem/s 259.31 Melem/s]
                 change:
                        time:   [−0.2260% −0.0730% +0.0660%] (p = 0.34 > 0.05)
                        thrpt:  [−0.0660% +0.0731% +0.2265%]
                        No change in performance detected.
Found 9 outliers among 100 measurements (9.00%)
  5 (5.00%) low severe
  3 (3.00%) low mild
  1 (1.00%) high severe
Inverse f32/PhastFT DIT/4096
                        time:   [6.8315 µs 6.8354 µs 6.8387 µs]
                        thrpt:  [598.95 Melem/s 599.23 Melem/s 599.57 Melem/s]
                 change:
                        time:   [−1.8897% −1.6179% −1.3245%] (p = 0.00 < 0.05)
                        thrpt:  [+1.3423% +1.6445% +1.9261%]
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  2 (2.00%) low severe
  2 (2.00%) low mild
Inverse f32/PhastFT DIF/8192
                        time:   [33.748 µs 33.848 µs 33.978 µs]
                        thrpt:  [241.09 Melem/s 242.02 Melem/s 242.74 Melem/s]
                 change:
                        time:   [+6.4124% +7.8286% +9.2127%] (p = 0.00 < 0.05)
                        thrpt:  [−8.4355% −7.2603% −6.0260%]
                        Performance has regressed.
Found 9 outliers among 100 measurements (9.00%)
  6 (6.00%) high mild
  3 (3.00%) high severe
Inverse f32/PhastFT DIT/8192
                        time:   [14.577 µs 14.589 µs 14.604 µs]
                        thrpt:  [560.93 Melem/s 561.51 Melem/s 561.98 Melem/s]
                 change:
                        time:   [−0.7712% −0.3298% +0.1769%] (p = 0.17 > 0.05)
                        thrpt:  [−0.1766% +0.3308% +0.7772%]
                        No change in performance detected.
Found 14 outliers among 100 measurements (14.00%)
  2 (2.00%) low mild
  5 (5.00%) high mild
  7 (7.00%) high severe
Inverse f32/PhastFT DIF/16384
                        time:   [83.906 µs 83.931 µs 83.960 µs]
                        thrpt:  [195.14 Melem/s 195.21 Melem/s 195.27 Melem/s]
                 change:
                        time:   [+0.0743% +0.1957% +0.3367%] (p = 0.00 < 0.05)
                        thrpt:  [−0.3356% −0.1953% −0.0742%]
                        Change within noise threshold.
Found 10 outliers among 100 measurements (10.00%)
  6 (6.00%) high mild
  4 (4.00%) high severe
Inverse f32/PhastFT DIT/16384
                        time:   [49.206 µs 49.234 µs 49.265 µs]
                        thrpt:  [332.57 Melem/s 332.78 Melem/s 332.97 Melem/s]
                 change:
                        time:   [−0.4674% −0.2220% +0.0336%] (p = 0.08 > 0.05)
                        thrpt:  [−0.0336% +0.2225% +0.4696%]
                        No change in performance detected.
Found 13 outliers among 100 measurements (13.00%)
  1 (1.00%) low severe
  1 (1.00%) low mild
  2 (2.00%) high mild
  9 (9.00%) high severe
Inverse f32/PhastFT DIF/32768
                        time:   [200.35 µs 200.39 µs 200.44 µs]
                        thrpt:  [163.48 Melem/s 163.52 Melem/s 163.56 Melem/s]
                 change:
                        time:   [+0.7339% +0.8569% +1.0002%] (p = 0.00 < 0.05)
                        thrpt:  [−0.9903% −0.8496% −0.7286%]
                        Change within noise threshold.
Found 7 outliers among 100 measurements (7.00%)
  1 (1.00%) low severe
  3 (3.00%) high mild
  3 (3.00%) high severe
Inverse f32/PhastFT DIT/32768
                        time:   [131.19 µs 131.23 µs 131.26 µs]
                        thrpt:  [249.64 Melem/s 249.70 Melem/s 249.78 Melem/s]
                 change:
                        time:   [−1.0630% −0.7513% −0.4821%] (p = 0.00 < 0.05)
                        thrpt:  [+0.4845% +0.7570% +1.0744%]
                        Change within noise threshold.
Found 5 outliers among 100 measurements (5.00%)
  2 (2.00%) low severe
  3 (3.00%) low mild
Inverse f32/PhastFT DIF/65536
                        time:   [399.11 µs 399.20 µs 399.28 µs]
                        thrpt:  [164.14 Melem/s 164.17 Melem/s 164.21 Melem/s]
                 change:
                        time:   [−0.1134% −0.0391% +0.0303%] (p = 0.29 > 0.05)
                        thrpt:  [−0.0303% +0.0391% +0.1135%]
                        No change in performance detected.
Found 3 outliers among 100 measurements (3.00%)
  3 (3.00%) low mild
Inverse f32/PhastFT DIT/65536
                        time:   [263.04 µs 263.16 µs 263.26 µs]
                        thrpt:  [248.94 Melem/s 249.04 Melem/s 249.15 Melem/s]
                 change:
                        time:   [+0.9002% +0.9913% +1.0850%] (p = 0.00 < 0.05)
                        thrpt:  [−1.0734% −0.9816% −0.8922%]
                        Change within noise threshold.
Found 3 outliers among 100 measurements (3.00%)
  1 (1.00%) low mild
  2 (2.00%) high mild
Benchmarking Inverse f32/PhastFT DIF/131072: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 7.1s, enable flat sampling, or reduce sample count to 50.
Inverse f32/PhastFT DIF/131072
                        time:   [822.68 µs 822.92 µs 823.18 µs]
                        thrpt:  [159.23 Melem/s 159.28 Melem/s 159.32 Melem/s]
                 change:
                        time:   [−0.8796% −0.7909% −0.7013%] (p = 0.00 < 0.05)
                        thrpt:  [+0.7063% +0.7972% +0.8874%]
                        Change within noise threshold.
Found 6 outliers among 100 measurements (6.00%)
  2 (2.00%) low severe
  1 (1.00%) low mild
  2 (2.00%) high mild
  1 (1.00%) high severe
Benchmarking Inverse f32/PhastFT DIT/131072: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 5.8s, enable flat sampling, or reduce sample count to 60.
Inverse f32/PhastFT DIT/131072
                        time:   [537.85 µs 538.17 µs 538.46 µs]
                        thrpt:  [243.42 Melem/s 243.55 Melem/s 243.70 Melem/s]
                 change:
                        time:   [−3.6779% −3.5409% −3.4175%] (p = 0.00 < 0.05)
                        thrpt:  [+3.5385% +3.6709% +3.8183%]
                        Performance has improved.
Found 3 outliers among 100 measurements (3.00%)
  3 (3.00%) low mild
Inverse f32/PhastFT DIF/262144
                        time:   [1.7227 ms 1.7232 ms 1.7237 ms]
                        thrpt:  [152.08 Melem/s 152.13 Melem/s 152.17 Melem/s]
                 change:
                        time:   [−3.9105% −3.8683% −3.8233%] (p = 0.00 < 0.05)
                        thrpt:  [+3.9753% +4.0239% +4.0696%]
                        Performance has improved.
Found 8 outliers among 100 measurements (8.00%)
  7 (7.00%) high mild
  1 (1.00%) high severe
Inverse f32/PhastFT DIT/262144
                        time:   [1.1715 ms 1.1719 ms 1.1723 ms]
                        thrpt:  [223.62 Melem/s 223.70 Melem/s 223.76 Melem/s]
                 change:
                        time:   [−9.5079% −9.4678% −9.4279%] (p = 0.00 < 0.05)
                        thrpt:  [+10.409% +10.458% +10.507%]
                        Performance has improved.
Found 7 outliers among 100 measurements (7.00%)
  2 (2.00%) high mild
  5 (5.00%) high severe
Inverse f32/PhastFT DIF/524288
                        time:   [3.4742 ms 3.4752 ms 3.4763 ms]
                        thrpt:  [150.82 Melem/s 150.86 Melem/s 150.91 Melem/s]
                 change:
                        time:   [−4.3495% −4.3123% −4.2755%] (p = 0.00 < 0.05)
                        thrpt:  [+4.4664% +4.5067% +4.5473%]
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  4 (4.00%) high severe
Inverse f32/PhastFT DIT/524288
                        time:   [2.3658 ms 2.3671 ms 2.3685 ms]
                        thrpt:  [221.36 Melem/s 221.49 Melem/s 221.61 Melem/s]
                 change:
                        time:   [−7.1002% −7.0433% −6.9806%] (p = 0.00 < 0.05)
                        thrpt:  [+7.5045% +7.5770% +7.6428%]
                        Performance has improved.
Found 5 outliers among 100 measurements (5.00%)
  1 (1.00%) high mild
  4 (4.00%) high severe
Inverse f32/PhastFT DIF/1048576
                        time:   [6.9308 ms 6.9349 ms 6.9396 ms]
                        thrpt:  [151.10 Melem/s 151.20 Melem/s 151.29 Melem/s]
                 change:
                        time:   [−1.6681% −1.6019% −1.5264%] (p = 0.00 < 0.05)
                        thrpt:  [+1.5500% +1.6280% +1.6964%]
                        Performance has improved.
Found 10 outliers among 100 measurements (10.00%)
  4 (4.00%) high mild
  6 (6.00%) high severe
Inverse f32/PhastFT DIT/1048576
                        time:   [5.1240 ms 5.1276 ms 5.1316 ms]
                        thrpt:  [204.34 Melem/s 204.50 Melem/s 204.64 Melem/s]
                 change:
                        time:   [−1.0442% −0.9154% −0.8044%] (p = 0.00 < 0.05)
                        thrpt:  [+0.8109% +0.9238% +1.0553%]
                        Change within noise threshold.
Found 9 outliers among 100 measurements (9.00%)
  1 (1.00%) low mild
  4 (4.00%) high mild
  4 (4.00%) high severe
Inverse f32/PhastFT DIF/2097152
                        time:   [15.441 ms 15.475 ms 15.509 ms]
                        thrpt:  [135.22 Melem/s 135.52 Melem/s 135.82 Melem/s]
                 change:
                        time:   [+4.2875% +4.4960% +4.7488%] (p = 0.00 < 0.05)
                        thrpt:  [−4.5335% −4.3026% −4.1112%]
                        Performance has regressed.
Inverse f32/PhastFT DIT/2097152
                        time:   [10.218 ms 10.226 ms 10.235 ms]
                        thrpt:  [204.90 Melem/s 205.08 Melem/s 205.25 Melem/s]
                 change:
                        time:   [−8.1122% −7.9586% −7.8073%] (p = 0.00 < 0.05)
                        thrpt:  [+8.4685% +8.6468% +8.8284%]
                        Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
  1 (1.00%) high mild
  1 (1.00%) high severe
Benchmarking Inverse f32/PhastFT DIF/4194304: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 6.8s, or reduce sample count to 70.
Inverse f32/PhastFT DIF/4194304
                        time:   [41.400 ms 41.877 ms 42.359 ms]
                        thrpt:  [99.019 Melem/s 100.16 Melem/s 101.31 Melem/s]
                 change:
                        time:   [−0.6047% +1.0345% +2.6284%] (p = 0.21 > 0.05)
                        thrpt:  [−2.5611% −1.0239% +0.6084%]
                        No change in performance detected.
Benchmarking Inverse f32/PhastFT DIT/4194304: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 5.0s, or reduce sample count to 90.
Inverse f32/PhastFT DIT/4194304
                        time:   [22.875 ms 23.326 ms 23.771 ms]
                        thrpt:  [176.45 Melem/s 179.82 Melem/s 183.36 Melem/s]
                 change:
                        time:   [−17.237% −15.161% −12.928%] (p = 0.00 < 0.05)
                        thrpt:  [+14.848% +17.870% +20.827%]
                        Performance has improved.
Benchmarking Inverse f32/PhastFT DIF/8388608: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 17.0s, or reduce sample count to 20.
Inverse f32/PhastFT DIF/8388608
                        time:   [94.415 ms 94.973 ms 95.519 ms]
                        thrpt:  [87.821 Melem/s 88.326 Melem/s 88.848 Melem/s]
                 change:
                        time:   [+2.7216% +3.5137% +4.3018%] (p = 0.00 < 0.05)
                        thrpt:  [−4.1244% −3.3944% −2.6495%]
                        Performance has regressed.
Found 1 outliers among 100 measurements (1.00%)
  1 (1.00%) high mild
Benchmarking Inverse f32/PhastFT DIT/8388608: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 11.8s, or reduce sample count to 40.
Inverse f32/PhastFT DIT/8388608
                        time:   [49.794 ms 50.186 ms 50.607 ms]
                        thrpt:  [165.76 Melem/s 167.15 Melem/s 168.47 Melem/s]
                 change:
                        time:   [−29.428% −28.828% −28.101%] (p = 0.00 < 0.05)
                        thrpt:  [+39.085% +40.505% +41.699%]
                        Performance has improved.
Found 11 outliers among 100 measurements (11.00%)
  9 (9.00%) high mild
  2 (2.00%) high severe
Benchmarking Inverse f32/PhastFT DIF/16777216: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 33.9s, or reduce sample count to 10.
Inverse f32/PhastFT DIF/16777216
                        time:   [222.34 ms 223.03 ms 223.72 ms]
                        thrpt:  [74.993 Melem/s 75.225 Melem/s 75.458 Melem/s]
                 change:
                        time:   [−39.209% −38.998% −38.767%] (p = 0.00 < 0.05)
                        thrpt:  [+63.310% +63.929% +64.497%]
                        Performance has improved.
Benchmarking Inverse f32/PhastFT DIT/16777216: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 23.0s, or reduce sample count to 20.
Inverse f32/PhastFT DIT/16777216
                        time:   [112.82 ms 113.28 ms 113.81 ms]
                        thrpt:  [147.41 Melem/s 148.10 Melem/s 148.71 Melem/s]
                 change:
                        time:   [−35.556% −35.215% −34.810%] (p = 0.00 < 0.05)
                        thrpt:  [+53.399% +54.356% +55.173%]
                        Performance has improved.
Found 10 outliers among 100 measurements (10.00%)
  1 (1.00%) high mild
  9 (9.00%) high severe

Forward f64/PhastFT DIF/64
                        time:   [351.97 ns 352.27 ns 352.50 ns]
                        thrpt:  [181.56 Melem/s 181.68 Melem/s 181.83 Melem/s]
                 change:
                        time:   [+0.5832% +0.6850% +0.7897%] (p = 0.00 < 0.05)
                        thrpt:  [−0.7835% −0.6803% −0.5799%]
                        Change within noise threshold.
Found 5 outliers among 100 measurements (5.00%)
  1 (1.00%) low severe
  1 (1.00%) low mild
  2 (2.00%) high mild
  1 (1.00%) high severe
Forward f64/PhastFT DIT/64
                        time:   [224.48 ns 224.60 ns 224.71 ns]
                        thrpt:  [284.81 Melem/s 284.95 Melem/s 285.10 Melem/s]
                 change:
                        time:   [+2.6148% +2.7498% +2.8920%] (p = 0.00 < 0.05)
                        thrpt:  [−2.8108% −2.6762% −2.5481%]
                        Performance has regressed.
Found 7 outliers among 100 measurements (7.00%)
  1 (1.00%) low severe
  3 (3.00%) low mild
  2 (2.00%) high mild
  1 (1.00%) high severe
Forward f64/PhastFT DIF/128
                        time:   [548.89 ns 549.26 ns 549.64 ns]
                        thrpt:  [232.88 Melem/s 233.04 Melem/s 233.20 Melem/s]
                 change:
                        time:   [−4.0394% −3.9427% −3.8451%] (p = 0.00 < 0.05)
                        thrpt:  [+3.9989% +4.1045% +4.2095%]
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  4 (4.00%) low mild
Forward f64/PhastFT DIT/128
                        time:   [325.63 ns 325.84 ns 326.04 ns]
                        thrpt:  [392.58 Melem/s 392.83 Melem/s 393.08 Melem/s]
                 change:
                        time:   [+1.6320% +1.7780% +1.9161%] (p = 0.00 < 0.05)
                        thrpt:  [−1.8801% −1.7469% −1.6058%]
                        Performance has regressed.
Found 5 outliers among 100 measurements (5.00%)
  2 (2.00%) low severe
  2 (2.00%) low mild
  1 (1.00%) high mild
Forward f64/PhastFT DIF/256
                        time:   [1.0207 µs 1.0213 µs 1.0220 µs]
                        thrpt:  [250.50 Melem/s 250.65 Melem/s 250.81 Melem/s]
                 change:
                        time:   [−7.9378% −7.8305% −7.7297%] (p = 0.00 < 0.05)
                        thrpt:  [+8.3772% +8.4957% +8.6223%]
                        Performance has improved.
Found 5 outliers among 100 measurements (5.00%)
  2 (2.00%) low severe
  3 (3.00%) low mild
Forward f64/PhastFT DIT/256
                        time:   [683.80 ns 684.13 ns 684.51 ns]
                        thrpt:  [373.99 Melem/s 374.20 Melem/s 374.38 Melem/s]
                 change:
                        time:   [+0.0133% +0.2344% +0.4299%] (p = 0.03 < 0.05)
                        thrpt:  [−0.4280% −0.2339% −0.0133%]
                        Change within noise threshold.
Found 15 outliers among 100 measurements (15.00%)
  7 (7.00%) low severe
  3 (3.00%) low mild
  5 (5.00%) high mild
Forward f64/PhastFT DIF/512
                        time:   [2.5687 µs 2.5703 µs 2.5718 µs]
                        thrpt:  [199.08 Melem/s 199.20 Melem/s 199.32 Melem/s]
                 change:
                        time:   [−3.8500% −3.7190% −3.5978%] (p = 0.00 < 0.05)
                        thrpt:  [+3.7320% +3.8627% +4.0041%]
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  2 (2.00%) low severe
  1 (1.00%) low mild
  1 (1.00%) high mild
Forward f64/PhastFT DIT/512
                        time:   [1.9968 µs 1.9986 µs 2.0002 µs]
                        thrpt:  [255.98 Melem/s 256.18 Melem/s 256.41 Melem/s]
                 change:
                        time:   [−1.7362% −1.5760% −1.4133%] (p = 0.00 < 0.05)
                        thrpt:  [+1.4336% +1.6012% +1.7669%]
                        Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
  2 (2.00%) low severe
Forward f64/PhastFT DIF/1024
                        time:   [5.5071 µs 5.5105 µs 5.5140 µs]
                        thrpt:  [185.71 Melem/s 185.83 Melem/s 185.94 Melem/s]
                 change:
                        time:   [−0.5133% −0.3822% −0.2413%] (p = 0.00 < 0.05)
                        thrpt:  [+0.2419% +0.3837% +0.5159%]
                        Change within noise threshold.
Found 6 outliers among 100 measurements (6.00%)
  5 (5.00%) low mild
  1 (1.00%) high mild
Forward f64/PhastFT DIT/1024
                        time:   [4.4760 µs 4.4802 µs 4.4840 µs]
                        thrpt:  [228.37 Melem/s 228.56 Melem/s 228.78 Melem/s]
                 change:
                        time:   [−0.8997% −0.7149% −0.5461%] (p = 0.00 < 0.05)
                        thrpt:  [+0.5491% +0.7200% +0.9079%]
                        Change within noise threshold.
Found 4 outliers among 100 measurements (4.00%)
  2 (2.00%) low severe
  2 (2.00%) low mild
Forward f64/PhastFT DIF/2048
                        time:   [7.0814 µs 7.0842 µs 7.0874 µs]
                        thrpt:  [288.96 Melem/s 289.09 Melem/s 289.21 Melem/s]
                 change:
                        time:   [−0.8718% −0.6245% −0.3743%] (p = 0.00 < 0.05)
                        thrpt:  [+0.3757% +0.6285% +0.8795%]
                        Change within noise threshold.
Found 6 outliers among 100 measurements (6.00%)
  2 (2.00%) low severe
  2 (2.00%) low mild
  2 (2.00%) high mild
Forward f64/PhastFT DIT/2048
                        time:   [4.7889 µs 4.7925 µs 4.7960 µs]
                        thrpt:  [427.02 Melem/s 427.33 Melem/s 427.65 Melem/s]
                 change:
                        time:   [−5.2561% −4.9725% −4.7172%] (p = 0.00 < 0.05)
                        thrpt:  [+4.9508% +5.2326% +5.5477%]
                        Performance has improved.
Found 5 outliers among 100 measurements (5.00%)
  2 (2.00%) low severe
  2 (2.00%) low mild
  1 (1.00%) high mild
Forward f64/PhastFT DIF/4096
                        time:   [15.492 µs 15.543 µs 15.608 µs]
                        thrpt:  [262.44 Melem/s 263.53 Melem/s 264.39 Melem/s]
                 change:
                        time:   [+7.3995% +9.2304% +10.942%] (p = 0.00 < 0.05)
                        thrpt:  [−9.8630% −8.4504% −6.8897%]
                        Performance has regressed.
Found 10 outliers among 100 measurements (10.00%)
  6 (6.00%) high mild
  4 (4.00%) high severe
Forward f64/PhastFT DIT/4096
                        time:   [10.814 µs 10.839 µs 10.872 µs]
                        thrpt:  [376.73 Melem/s 377.88 Melem/s 378.78 Melem/s]
                 change:
                        time:   [+2.6930% +3.8904% +5.2058%] (p = 0.00 < 0.05)
                        thrpt:  [−4.9482% −3.7447% −2.6224%]
                        Performance has regressed.
Found 11 outliers among 100 measurements (11.00%)
  6 (6.00%) high mild
  5 (5.00%) high severe
Forward f64/PhastFT DIF/8192
                        time:   [38.983 µs 39.000 µs 39.021 µs]
                        thrpt:  [209.94 Melem/s 210.05 Melem/s 210.14 Melem/s]
                 change:
                        time:   [−1.2276% −1.0557% −0.8839%] (p = 0.00 < 0.05)
                        thrpt:  [+0.8918% +1.0669% +1.2429%]
                        Change within noise threshold.
Found 8 outliers among 100 measurements (8.00%)
  5 (5.00%) high mild
  3 (3.00%) high severe
Forward f64/PhastFT DIT/8192
                        time:   [30.198 µs 30.217 µs 30.241 µs]
                        thrpt:  [270.89 Melem/s 271.10 Melem/s 271.28 Melem/s]
                 change:
                        time:   [−3.0249% −2.6665% −2.2623%] (p = 0.00 < 0.05)
                        thrpt:  [+2.3146% +2.7395% +3.1192%]
                        Performance has improved.
Found 10 outliers among 100 measurements (10.00%)
  7 (7.00%) high mild
  3 (3.00%) high severe
Forward f64/PhastFT DIF/16384
                        time:   [99.881 µs 99.917 µs 99.949 µs]
                        thrpt:  [163.92 Melem/s 163.98 Melem/s 164.04 Melem/s]
                 change:
                        time:   [−0.8065% −0.5979% −0.3551%] (p = 0.00 < 0.05)
                        thrpt:  [+0.3563% +0.6015% +0.8131%]
                        Change within noise threshold.
Found 15 outliers among 100 measurements (15.00%)
  11 (11.00%) low severe
  2 (2.00%) low mild
  2 (2.00%) high mild
Forward f64/PhastFT DIT/16384
                        time:   [83.966 µs 84.076 µs 84.169 µs]
                        thrpt:  [194.66 Melem/s 194.87 Melem/s 195.13 Melem/s]
                 change:
                        time:   [−2.3473% −2.0532% −1.7496%] (p = 0.00 < 0.05)
                        thrpt:  [+1.7808% +2.0963% +2.4037%]
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  2 (2.00%) low severe
  2 (2.00%) low mild
Forward f64/PhastFT DIF/32768
                        time:   [228.24 µs 228.36 µs 228.49 µs]
                        thrpt:  [143.41 Melem/s 143.50 Melem/s 143.57 Melem/s]
                 change:
                        time:   [−2.2832% −2.1319% −1.9914%] (p = 0.00 < 0.05)
                        thrpt:  [+2.0318% +2.1783% +2.3365%]
                        Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
  1 (1.00%) low severe
  1 (1.00%) low mild
Forward f64/PhastFT DIT/32768
                        time:   [197.87 µs 197.95 µs 198.03 µs]
                        thrpt:  [165.47 Melem/s 165.54 Melem/s 165.60 Melem/s]
                 change:
                        time:   [−3.1444% −3.0174% −2.8962%] (p = 0.00 < 0.05)
                        thrpt:  [+2.9826% +3.1113% +3.2465%]
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  1 (1.00%) low severe
  3 (3.00%) low mild
Forward f64/PhastFT DIF/65536
                        time:   [488.46 µs 488.64 µs 488.84 µs]
                        thrpt:  [134.07 Melem/s 134.12 Melem/s 134.17 Melem/s]
                 change:
                        time:   [−1.4689% −1.3202% −1.1791%] (p = 0.00 < 0.05)
                        thrpt:  [+1.1932% +1.3379% +1.4908%]
                        Performance has improved.
Found 14 outliers among 100 measurements (14.00%)
  5 (5.00%) low severe
  8 (8.00%) low mild
  1 (1.00%) high mild
Forward f64/PhastFT DIT/65536
                        time:   [416.95 µs 417.14 µs 417.34 µs]
                        thrpt:  [157.03 Melem/s 157.11 Melem/s 157.18 Melem/s]
                 change:
                        time:   [−5.5571% −5.3823% −5.2227%] (p = 0.00 < 0.05)
                        thrpt:  [+5.5105% +5.6885% +5.8840%]
                        Performance has improved.
Found 9 outliers among 100 measurements (9.00%)
  5 (5.00%) low severe
  3 (3.00%) low mild
  1 (1.00%) high mild
Benchmarking Forward f64/PhastFT DIF/131072: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 9.9s, enable flat sampling, or reduce sample count to 50.
Forward f64/PhastFT DIF/131072
                        time:   [1.0553 ms 1.0567 ms 1.0581 ms]
                        thrpt:  [123.88 Melem/s 124.03 Melem/s 124.20 Melem/s]
                 change:
                        time:   [−8.7043% −8.5273% −8.3838%] (p = 0.00 < 0.05)
                        thrpt:  [+9.1510% +9.3222% +9.5342%]
                        Performance has improved.
Found 9 outliers among 100 measurements (9.00%)
  1 (1.00%) low severe
  8 (8.00%) low mild
Benchmarking Forward f64/PhastFT DIT/131072: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 9.3s, enable flat sampling, or reduce sample count to 50.
Forward f64/PhastFT DIT/131072
                        time:   [919.41 µs 920.50 µs 921.54 µs]
                        thrpt:  [142.23 Melem/s 142.39 Melem/s 142.56 Melem/s]
                 change:
                        time:   [−16.421% −16.322% −16.230%] (p = 0.00 < 0.05)
                        thrpt:  [+19.375% +19.506% +19.647%]
                        Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
  2 (2.00%) high mild
Forward f64/PhastFT DIF/262144
                        time:   [2.2023 ms 2.2031 ms 2.2041 ms]
                        thrpt:  [118.94 Melem/s 118.99 Melem/s 119.03 Melem/s]
                 change:
                        time:   [−8.9696% −8.9125% −8.8566%] (p = 0.00 < 0.05)
                        thrpt:  [+9.7172% +9.7846% +9.8534%]
                        Performance has improved.
Found 8 outliers among 100 measurements (8.00%)
  5 (5.00%) high mild
  3 (3.00%) high severe
Forward f64/PhastFT DIT/262144
                        time:   [1.8719 ms 1.8724 ms 1.8729 ms]
                        thrpt:  [139.97 Melem/s 140.01 Melem/s 140.05 Melem/s]
                 change:
                        time:   [−12.265% −12.225% −12.188%] (p = 0.00 < 0.05)
                        thrpt:  [+13.879% +13.928% +13.979%]
                        Performance has improved.
Found 7 outliers among 100 measurements (7.00%)
  6 (6.00%) high mild
  1 (1.00%) high severe
Forward f64/PhastFT DIF/524288
                        time:   [4.3439 ms 4.3458 ms 4.3478 ms]
                        thrpt:  [120.59 Melem/s 120.64 Melem/s 120.70 Melem/s]
                 change:
                        time:   [−4.6281% −4.5485% −4.4693%] (p = 0.00 < 0.05)
                        thrpt:  [+4.6784% +4.7653% +4.8527%]
                        Performance has improved.
Found 6 outliers among 100 measurements (6.00%)
  6 (6.00%) high mild
Forward f64/PhastFT DIT/524288
                        time:   [4.0808 ms 4.0826 ms 4.0848 ms]
                        thrpt:  [128.35 Melem/s 128.42 Melem/s 128.48 Melem/s]
                 change:
                        time:   [−5.2492% −5.1707% −5.0902%] (p = 0.00 < 0.05)
                        thrpt:  [+5.3632% +5.4526% +5.5400%]
                        Performance has improved.
Found 7 outliers among 100 measurements (7.00%)
  1 (1.00%) low mild
  2 (2.00%) high mild
  4 (4.00%) high severe
Forward f64/PhastFT DIF/1048576
                        time:   [10.057 ms 10.067 ms 10.079 ms]
                        thrpt:  [104.04 Melem/s 104.16 Melem/s 104.27 Melem/s]
                 change:
                        time:   [−2.9829% −2.5768% −2.1650%] (p = 0.00 < 0.05)
                        thrpt:  [+2.2129% +2.6450% +3.0746%]
                        Performance has improved.
Found 5 outliers among 100 measurements (5.00%)
  3 (3.00%) high mild
  2 (2.00%) high severe
Forward f64/PhastFT DIT/1048576
                        time:   [8.4189 ms 8.4252 ms 8.4324 ms]
                        thrpt:  [124.35 Melem/s 124.46 Melem/s 124.55 Melem/s]
                 change:
                        time:   [−9.3968% −9.2682% −9.1499%] (p = 0.00 < 0.05)
                        thrpt:  [+10.071% +10.215% +10.371%]
                        Performance has improved.
Found 6 outliers among 100 measurements (6.00%)
  5 (5.00%) high mild
  1 (1.00%) high severe
Benchmarking Forward f64/PhastFT DIF/2097152: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 5.5s, or reduce sample count to 90.
Forward f64/PhastFT DIF/2097152
                        time:   [32.915 ms 33.057 ms 33.202 ms]
                        thrpt:  [63.164 Melem/s 63.441 Melem/s 63.714 Melem/s]
                 change:
                        time:   [+0.0133% +0.6835% +1.3079%] (p = 0.04 < 0.05)
                        thrpt:  [−1.2910% −0.6789% −0.0133%]
                        Change within noise threshold.
Forward f64/PhastFT DIT/2097152
                        time:   [22.255 ms 22.275 ms 22.296 ms]
                        thrpt:  [94.062 Melem/s 94.147 Melem/s 94.231 Melem/s]
                 change:
                        time:   [−20.516% −19.579% −18.611%] (p = 0.00 < 0.05)
                        thrpt:  [+22.867% +24.345% +25.811%]
                        Performance has improved.
Benchmarking Forward f64/PhastFT DIF/4194304: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 13.5s, or reduce sample count to 30.
Forward f64/PhastFT DIF/4194304
                        time:   [69.802 ms 70.123 ms 70.471 ms]
                        thrpt:  [59.518 Melem/s 59.813 Melem/s 60.089 Melem/s]
                 change:
                        time:   [+1.1439% +1.8593% +2.5155%] (p = 0.00 < 0.05)
                        thrpt:  [−2.4538% −1.8254% −1.1310%]
                        Performance has regressed.
Found 9 outliers among 100 measurements (9.00%)
  8 (8.00%) high mild
  1 (1.00%) high severe
Benchmarking Forward f64/PhastFT DIT/4194304: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 10.0s, or reduce sample count to 50.
Forward f64/PhastFT DIT/4194304
                        time:   [41.892 ms 42.238 ms 42.610 ms]
                        thrpt:  [98.434 Melem/s 99.301 Melem/s 100.12 Melem/s]
                 change:
                        time:   [−33.451% −32.821% −32.181%] (p = 0.00 < 0.05)
                        thrpt:  [+47.450% +48.857% +50.266%]
                        Performance has improved.
Found 18 outliers among 100 measurements (18.00%)
  9 (9.00%) high mild
  9 (9.00%) high severe
Benchmarking Forward f64/PhastFT DIF/8388608: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 27.6s, or reduce sample count to 10.
Forward f64/PhastFT DIF/8388608
                        time:   [174.53 ms 175.04 ms 175.58 ms]
                        thrpt:  [47.777 Melem/s 47.924 Melem/s 48.063 Melem/s]
                 change:
                        time:   [−33.523% −33.290% −33.063%] (p = 0.00 < 0.05)
                        thrpt:  [+49.394% +49.903% +50.428%]
                        Performance has improved.
Found 1 outliers among 100 measurements (1.00%)
  1 (1.00%) high mild
Benchmarking Forward f64/PhastFT DIT/8388608: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 19.5s, or reduce sample count to 20.
Forward f64/PhastFT DIT/8388608
                        time:   [96.441 ms 97.100 ms 97.765 ms]
                        thrpt:  [85.804 Melem/s 86.392 Melem/s 86.982 Melem/s]
                 change:
                        time:   [−37.517% −37.078% −36.584%] (p = 0.00 < 0.05)
                        thrpt:  [+57.690% +58.926% +60.045%]
                        Performance has improved.
Benchmarking Forward f64/PhastFT DIF/16777216: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 100.9s, or reduce sample count to 10.
Forward f64/PhastFT DIF/16777216
                        time:   [809.53 ms 810.21 ms 811.03 ms]
                        thrpt:  [20.686 Melem/s 20.707 Melem/s 20.725 Melem/s]
                 change:
                        time:   [+1.5983% +1.8346% +2.0706%] (p = 0.00 < 0.05)
                        thrpt:  [−2.0286% −1.8015% −1.5731%]
                        Performance has regressed.
Found 2 outliers among 100 measurements (2.00%)
  2 (2.00%) high severe
Benchmarking Forward f64/PhastFT DIT/16777216: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 69.2s, or reduce sample count to 10.
Forward f64/PhastFT DIT/16777216
                        time:   [491.39 ms 492.08 ms 492.81 ms]
                        thrpt:  [34.044 Melem/s 34.095 Melem/s 34.142 Melem/s]
                 change:
                        time:   [−11.989% −11.825% −11.657%] (p = 0.00 < 0.05)
                        thrpt:  [+13.195% +13.411% +13.623%]
                        Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
  2 (2.00%) high mild

Inverse f64/PhastFT DIF/64
                        time:   [369.68 ns 371.00 ns 372.32 ns]
                        thrpt:  [171.90 Melem/s 172.51 Melem/s 173.12 Melem/s]
                 change:
                        time:   [+1.1146% +1.4734% +1.8685%] (p = 0.00 < 0.05)
                        thrpt:  [−1.8342% −1.4521% −1.1023%]
                        Performance has regressed.
Inverse f64/PhastFT DIT/64
                        time:   [244.79 ns 245.06 ns 245.33 ns]
                        thrpt:  [260.87 Melem/s 261.16 Melem/s 261.45 Melem/s]
                 change:
                        time:   [+3.3424% +3.5165% +3.6936%] (p = 0.00 < 0.05)
                        thrpt:  [−3.5620% −3.3971% −3.2343%]
                        Performance has regressed.
Found 1 outliers among 100 measurements (1.00%)
  1 (1.00%) low mild
Inverse f64/PhastFT DIF/128
                        time:   [545.69 ns 547.04 ns 548.36 ns]
                        thrpt:  [233.43 Melem/s 233.99 Melem/s 234.57 Melem/s]
                 change:
                        time:   [+0.3229% +0.5678% +0.8242%] (p = 0.00 < 0.05)
                        thrpt:  [−0.8175% −0.5646% −0.3219%]
                        Change within noise threshold.
Inverse f64/PhastFT DIT/128
                        time:   [347.74 ns 348.03 ns 348.33 ns]
                        thrpt:  [367.46 Melem/s 367.78 Melem/s 368.09 Melem/s]
                 change:
                        time:   [+0.9644% +1.1422% +1.3237%] (p = 0.00 < 0.05)
                        thrpt:  [−1.3064% −1.1293% −0.9551%]
                        Change within noise threshold.
Found 4 outliers among 100 measurements (4.00%)
  2 (2.00%) low severe
  1 (1.00%) low mild
  1 (1.00%) high mild
Inverse f64/PhastFT DIF/256
                        time:   [1.0840 µs 1.0851 µs 1.0862 µs]
                        thrpt:  [235.69 Melem/s 235.93 Melem/s 236.17 Melem/s]
                 change:
                        time:   [−3.5022% −3.3757% −3.2584%] (p = 0.00 < 0.05)
                        thrpt:  [+3.3682% +3.4936% +3.6293%]
                        Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
  1 (1.00%) low severe
  1 (1.00%) low mild
Inverse f64/PhastFT DIT/256
                        time:   [723.19 ns 724.10 ns 724.97 ns]
                        thrpt:  [353.12 Melem/s 353.54 Melem/s 353.99 Melem/s]
                 change:
                        time:   [−0.0431% +0.1648% +0.3654%] (p = 0.11 > 0.05)
                        thrpt:  [−0.3640% −0.1645% +0.0431%]
                        No change in performance detected.
Found 6 outliers among 100 measurements (6.00%)
  1 (1.00%) low severe
  4 (4.00%) low mild
  1 (1.00%) high mild
Inverse f64/PhastFT DIF/512
                        time:   [2.6903 µs 2.6922 µs 2.6941 µs]
                        thrpt:  [190.04 Melem/s 190.18 Melem/s 190.31 Melem/s]
                 change:
                        time:   [−0.9903% −0.8439% −0.7073%] (p = 0.00 < 0.05)
                        thrpt:  [+0.7123% +0.8511% +1.0002%]
                        Change within noise threshold.
Found 6 outliers among 100 measurements (6.00%)
  2 (2.00%) low severe
  3 (3.00%) low mild
  1 (1.00%) high severe
Inverse f64/PhastFT DIT/512
                        time:   [2.0929 µs 2.0953 µs 2.0975 µs]
                        thrpt:  [244.10 Melem/s 244.36 Melem/s 244.63 Melem/s]
                 change:
                        time:   [−1.0498% −0.9010% −0.7591%] (p = 0.00 < 0.05)
                        thrpt:  [+0.7649% +0.9092% +1.0609%]
                        Change within noise threshold.
Found 2 outliers among 100 measurements (2.00%)
  1 (1.00%) low severe
  1 (1.00%) low mild
Inverse f64/PhastFT DIF/1024
                        time:   [5.6957 µs 5.6995 µs 5.7036 µs]
                        thrpt:  [179.54 Melem/s 179.66 Melem/s 179.79 Melem/s]
                 change:
                        time:   [+0.8581% +1.0069% +1.1600%] (p = 0.00 < 0.05)
                        thrpt:  [−1.1467% −0.9969% −0.8508%]
                        Change within noise threshold.
Found 13 outliers among 100 measurements (13.00%)
  7 (7.00%) low severe
  5 (5.00%) high mild
  1 (1.00%) high severe
Inverse f64/PhastFT DIT/1024
                        time:   [4.6838 µs 4.6875 µs 4.6911 µs]
                        thrpt:  [218.29 Melem/s 218.45 Melem/s 218.63 Melem/s]
                 change:
                        time:   [−0.3025% −0.1201% +0.0610%] (p = 0.20 > 0.05)
                        thrpt:  [−0.0610% +0.1202% +0.3035%]
                        No change in performance detected.
Found 3 outliers among 100 measurements (3.00%)
  2 (2.00%) low severe
  1 (1.00%) low mild
Inverse f64/PhastFT DIF/2048
                        time:   [7.6107 µs 7.6184 µs 7.6248 µs]
                        thrpt:  [268.60 Melem/s 268.82 Melem/s 269.10 Melem/s]
                 change:
                        time:   [+0.9046% +1.1451% +1.4078%] (p = 0.00 < 0.05)
                        thrpt:  [−1.3883% −1.1322% −0.8965%]
                        Change within noise threshold.
Found 1 outliers among 100 measurements (1.00%)
  1 (1.00%) low severe
Inverse f64/PhastFT DIT/2048
                        time:   [5.2829 µs 5.2934 µs 5.3043 µs]
                        thrpt:  [386.10 Melem/s 386.89 Melem/s 387.66 Melem/s]
                 change:
                        time:   [−4.2373% −3.9450% −3.6415%] (p = 0.00 < 0.05)
                        thrpt:  [+3.7792% +4.1070% +4.4248%]
                        Performance has improved.
Found 3 outliers among 100 measurements (3.00%)
  3 (3.00%) low severe
Inverse f64/PhastFT DIF/4096
                        time:   [15.946 µs 15.960 µs 15.979 µs]
                        thrpt:  [256.34 Melem/s 256.64 Melem/s 256.87 Melem/s]
                 change:
                        time:   [+3.4076% +4.0030% +4.6164%] (p = 0.00 < 0.05)
                        thrpt:  [−4.4127% −3.8490% −3.2953%]
                        Performance has regressed.
Found 16 outliers among 100 measurements (16.00%)
  2 (2.00%) low severe
  2 (2.00%) low mild
  5 (5.00%) high mild
  7 (7.00%) high severe
Inverse f64/PhastFT DIT/4096
                        time:   [11.744 µs 11.769 µs 11.801 µs]
                        thrpt:  [347.10 Melem/s 348.04 Melem/s 348.77 Melem/s]
                 change:
                        time:   [+1.2058% +2.3495% +3.6112%] (p = 0.00 < 0.05)
                        thrpt:  [−3.4853% −2.2955% −1.1914%]
                        Performance has regressed.
Found 13 outliers among 100 measurements (13.00%)
  2 (2.00%) low mild
  6 (6.00%) high mild
  5 (5.00%) high severe
Inverse f64/PhastFT DIF/8192
                        time:   [40.552 µs 40.574 µs 40.603 µs]
                        thrpt:  [201.76 Melem/s 201.90 Melem/s 202.01 Melem/s]
                 change:
                        time:   [+0.8990% +1.0963% +1.2834%] (p = 0.00 < 0.05)
                        thrpt:  [−1.2671% −1.0844% −0.8910%]
                        Change within noise threshold.
Inverse f64/PhastFT DIT/8192
                        time:   [32.366 µs 32.384 µs 32.406 µs]
                        thrpt:  [252.79 Melem/s 252.96 Melem/s 253.11 Melem/s]
                 change:
                        time:   [+0.4750% +0.7616% +1.0617%] (p = 0.00 < 0.05)
                        thrpt:  [−1.0505% −0.7558% −0.4727%]
                        Change within noise threshold.
Found 6 outliers among 100 measurements (6.00%)
  5 (5.00%) high mild
  1 (1.00%) high severe
Inverse f64/PhastFT DIF/16384
                        time:   [104.41 µs 104.45 µs 104.49 µs]
                        thrpt:  [156.80 Melem/s 156.86 Melem/s 156.92 Melem/s]
                 change:
                        time:   [+0.7729% +0.9865% +1.1997%] (p = 0.00 < 0.05)
                        thrpt:  [−1.1854% −0.9768% −0.7670%]
                        Change within noise threshold.
Found 11 outliers among 100 measurements (11.00%)
  5 (5.00%) low severe
  5 (5.00%) low mild
  1 (1.00%) high severe
Inverse f64/PhastFT DIT/16384
                        time:   [87.410 µs 87.462 µs 87.506 µs]
                        thrpt:  [187.23 Melem/s 187.33 Melem/s 187.44 Melem/s]
                 change:
                        time:   [−2.4083% −2.1715% −1.9524%] (p = 0.00 < 0.05)
                        thrpt:  [+1.9913% +2.2197% +2.4677%]
                        Performance has improved.
Found 10 outliers among 100 measurements (10.00%)
  3 (3.00%) low severe
  7 (7.00%) low mild
Inverse f64/PhastFT DIF/32768
                        time:   [237.35 µs 237.42 µs 237.50 µs]
                        thrpt:  [137.97 Melem/s 138.02 Melem/s 138.06 Melem/s]
                 change:
                        time:   [−1.1354% −1.0107% −0.8873%] (p = 0.00 < 0.05)
                        thrpt:  [+0.8952% +1.0210% +1.1485%]
                        Change within noise threshold.
Found 15 outliers among 100 measurements (15.00%)
  8 (8.00%) low severe
  6 (6.00%) low mild
  1 (1.00%) high mild
Inverse f64/PhastFT DIT/32768
                        time:   [206.90 µs 206.98 µs 207.08 µs]
                        thrpt:  [158.24 Melem/s 158.31 Melem/s 158.37 Melem/s]
                 change:
                        time:   [−3.5341% −3.4080% −3.2904%] (p = 0.00 < 0.05)
                        thrpt:  [+3.4024% +3.5282% +3.6636%]
                        Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
  1 (1.00%) low mild
  1 (1.00%) high mild
Inverse f64/PhastFT DIF/65536
                        time:   [505.44 µs 505.57 µs 505.69 µs]
                        thrpt:  [129.60 Melem/s 129.63 Melem/s 129.66 Melem/s]
                 change:
                        time:   [−1.5079% −1.3294% −1.1519%] (p = 0.00 < 0.05)
                        thrpt:  [+1.1653% +1.3474% +1.5310%]
                        Performance has improved.
Found 19 outliers among 100 measurements (19.00%)
  15 (15.00%) low severe
  4 (4.00%) low mild
Inverse f64/PhastFT DIT/65536
                        time:   [432.76 µs 432.96 µs 433.20 µs]
                        thrpt:  [151.28 Melem/s 151.37 Melem/s 151.44 Melem/s]
                 change:
                        time:   [−4.9837% −4.7949% −4.6279%] (p = 0.00 < 0.05)
                        thrpt:  [+4.8525% +5.0364% +5.2451%]
                        Performance has improved.
Found 9 outliers among 100 measurements (9.00%)
  2 (2.00%) low severe
  7 (7.00%) low mild
Benchmarking Inverse f64/PhastFT DIF/131072: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 9.7s, enable flat sampling, or reduce sample count to 50.
Inverse f64/PhastFT DIF/131072
                        time:   [1.0865 ms 1.0877 ms 1.0888 ms]
                        thrpt:  [120.38 Melem/s 120.51 Melem/s 120.64 Melem/s]
                 change:
                        time:   [−7.6894% −7.5610% −7.4559%] (p = 0.00 < 0.05)
                        thrpt:  [+8.0566% +8.1795% +8.3299%]
                        Performance has improved.
Found 8 outliers among 100 measurements (8.00%)
  2 (2.00%) low severe
  6 (6.00%) low mild
Benchmarking Inverse f64/PhastFT DIT/131072: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 9.1s, enable flat sampling, or reduce sample count to 50.
Inverse f64/PhastFT DIT/131072
                        time:   [947.09 µs 948.15 µs 949.09 µs]
                        thrpt:  [138.10 Melem/s 138.24 Melem/s 138.39 Melem/s]
                 change:
                        time:   [−17.242% −17.158% −17.075%] (p = 0.00 < 0.05)
                        thrpt:  [+20.592% +20.712% +20.835%]
                        Performance has improved.
Inverse f64/PhastFT DIF/262144
                        time:   [2.2581 ms 2.2587 ms 2.2593 ms]
                        thrpt:  [116.03 Melem/s 116.06 Melem/s 116.09 Melem/s]
                 change:
                        time:   [−8.9809% −8.9451% −8.9093%] (p = 0.00 < 0.05)
                        thrpt:  [+9.7806% +9.8239% +9.8671%]
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  2 (2.00%) high mild
  2 (2.00%) high severe
Inverse f64/PhastFT DIT/262144
                        time:   [1.9313 ms 1.9321 ms 1.9329 ms]
                        thrpt:  [135.62 Melem/s 135.68 Melem/s 135.74 Melem/s]
                 change:
                        time:   [−12.068% −12.025% −11.979%] (p = 0.00 < 0.05)
                        thrpt:  [+13.609% +13.669% +13.724%]
                        Performance has improved.
Found 3 outliers among 100 measurements (3.00%)
  1 (1.00%) high mild
  2 (2.00%) high severe
Inverse f64/PhastFT DIF/524288
                        time:   [4.4505 ms 4.4519 ms 4.4534 ms]
                        thrpt:  [117.73 Melem/s 117.77 Melem/s 117.80 Melem/s]
                 change:
                        time:   [−3.8108% −3.7590% −3.7097%] (p = 0.00 < 0.05)
                        thrpt:  [+3.8526% +3.9058% +3.9618%]
                        Performance has improved.
Found 5 outliers among 100 measurements (5.00%)
  2 (2.00%) high mild
  3 (3.00%) high severe
Inverse f64/PhastFT DIT/524288
                        time:   [4.2177 ms 4.2190 ms 4.2205 ms]
                        thrpt:  [124.22 Melem/s 124.27 Melem/s 124.31 Melem/s]
                 change:
                        time:   [−5.5378% −5.4188% −5.3228%] (p = 0.00 < 0.05)
                        thrpt:  [+5.6221% +5.7292% +5.8624%]
                        Performance has improved.
Found 7 outliers among 100 measurements (7.00%)
  4 (4.00%) high mild
  3 (3.00%) high severe
Inverse f64/PhastFT DIF/1048576
                        time:   [10.341 ms 10.369 ms 10.399 ms]
                        thrpt:  [100.83 Melem/s 101.12 Melem/s 101.40 Melem/s]
                 change:
                        time:   [+1.5980% +1.9201% +2.2118%] (p = 0.00 < 0.05)
                        thrpt:  [−2.1639% −1.8839% −1.5729%]
                        Performance has regressed.
Found 2 outliers among 100 measurements (2.00%)
  2 (2.00%) high mild
Inverse f64/PhastFT DIT/1048576
                        time:   [8.6373 ms 8.6423 ms 8.6478 ms]
                        thrpt:  [121.25 Melem/s 121.33 Melem/s 121.40 Melem/s]
                 change:
                        time:   [−9.4505% −9.3152% −9.1859%] (p = 0.00 < 0.05)
                        thrpt:  [+10.115% +10.272% +10.437%]
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  3 (3.00%) high mild
  1 (1.00%) high severe
Benchmarking Inverse f64/PhastFT DIF/2097152: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 5.5s, or reduce sample count to 90.
Inverse f64/PhastFT DIF/2097152
                        time:   [33.181 ms 33.256 ms 33.332 ms]
                        thrpt:  [62.917 Melem/s 63.061 Melem/s 63.203 Melem/s]
                 change:
                        time:   [−1.6936% −1.2008% −0.6959%] (p = 0.00 < 0.05)
                        thrpt:  [+0.7008% +1.2154% +1.7228%]
                        Change within noise threshold.
Found 1 outliers among 100 measurements (1.00%)
  1 (1.00%) high mild
Inverse f64/PhastFT DIT/2097152
                        time:   [22.866 ms 22.883 ms 22.900 ms]
                        thrpt:  [91.577 Melem/s 91.648 Melem/s 91.716 Melem/s]
                 change:
                        time:   [−20.919% −19.944% −18.939%] (p = 0.00 < 0.05)
                        thrpt:  [+23.364% +24.912% +26.453%]
                        Performance has improved.
Found 5 outliers among 100 measurements (5.00%)
  5 (5.00%) high mild
Benchmarking Inverse f64/PhastFT DIF/4194304: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 13.7s, or reduce sample count to 30.
Inverse f64/PhastFT DIF/4194304
                        time:   [74.026 ms 74.580 ms 75.140 ms]
                        thrpt:  [55.820 Melem/s 56.239 Melem/s 56.660 Melem/s]
                 change:
                        time:   [+1.6842% +2.5966% +3.5024%] (p = 0.00 < 0.05)
                        thrpt:  [−3.3839% −2.5309% −1.6563%]
                        Performance has regressed.
Benchmarking Inverse f64/PhastFT DIT/4194304: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 10.1s, or reduce sample count to 40.
Inverse f64/PhastFT DIT/4194304
                        time:   [44.868 ms 45.215 ms 45.563 ms]
                        thrpt:  [92.055 Melem/s 92.764 Melem/s 93.482 Melem/s]
                 change:
                        time:   [−31.134% −30.463% −29.877%] (p = 0.00 < 0.05)
                        thrpt:  [+42.606% +43.809% +45.209%]
                        Performance has improved.
Benchmarking Inverse f64/PhastFT DIF/8388608: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 26.4s, or reduce sample count to 10.
Inverse f64/PhastFT DIF/8388608
                        time:   [167.05 ms 167.58 ms 168.10 ms]
                        thrpt:  [49.903 Melem/s 50.059 Melem/s 50.215 Melem/s]
                 change:
                        time:   [−39.284% −39.043% −38.790%] (p = 0.00 < 0.05)
                        thrpt:  [+63.373% +64.049% +64.702%]
                        Performance has improved.
Benchmarking Inverse f64/PhastFT DIT/8388608: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 20.0s, or reduce sample count to 20.
Inverse f64/PhastFT DIT/8388608
                        time:   [102.34 ms 102.96 ms 103.60 ms]
                        thrpt:  [80.969 Melem/s 81.476 Melem/s 81.970 Melem/s]
                 change:
                        time:   [−37.137% −36.699% −36.254%] (p = 0.00 < 0.05)
                        thrpt:  [+56.872% +57.974% +59.076%]
                        Performance has improved.
Benchmarking Inverse f64/PhastFT DIF/16777216: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 101.7s, or reduce sample count to 10.
Inverse f64/PhastFT DIF/16777216
                        time:   [824.18 ms 825.89 ms 827.64 ms]
                        thrpt:  [20.271 Melem/s 20.314 Melem/s 20.356 Melem/s]
                 change:
                        time:   [−0.1820% +0.1634% +0.4899%] (p = 0.34 > 0.05)
                        thrpt:  [−0.4875% −0.1632% +0.1823%]
                        No change in performance detected.
Benchmarking Inverse f64/PhastFT DIT/16777216: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase target time to 71.7s, or reduce sample count to 10.
Inverse f64/PhastFT DIT/16777216
                        time:   [517.82 ms 519.23 ms 520.68 ms]
                        thrpt:  [32.222 Melem/s 32.312 Melem/s 32.400 Melem/s]
                 change:
                        time:   [−10.951% −10.669% −10.386%] (p = 0.00 < 0.05)
                        thrpt:  [+11.590% +11.943% +12.298%]
                        Performance has improved.

[smu160]

I saw it get up to ~19% better on an m2 macbook air. Those are great results on zen4!

[Shnatsel]

An odd artifact of this is that DiF performance has improved by a lot for some sizes too. For example, Inverse f64/PhastFT DIF/8388608 shows a massive improvement.

But this PR doesn't seem to have touched DiF at all. Is there some shared code between the two? If not, that result is quite confusing.

[smu160]

That is odd. I do see some variation in DIF FFT, and even RustFFT times/throughput when running criterion benchmarks. I always attributed that to noise. I'm also using apple silicon, so I'm not sure what to make of it.