Add benchmarks for slices

Author: vlovich

benches/build.rs

@@ -6,19 +6,35 @@ use bencher::Bencher;
 
 use boomphf::Mphf;
 
-fn build1_ser(bench: &mut Bencher) {
+fn build1_ser_u64(bench: &mut Bencher) {
+    let items: Vec<u64> = (0..1000000u64).map(|x| x * 2).collect();
+    bench.iter(|| {
+        std::hint::black_box(Mphf::new(2.0, &items));
+    });
+}
+
+fn build1_ser_slices(bench: &mut Bencher) {
+    let items: Vec<[u8; 8]> = (0..1000000u64).map(|x| (x * 2).to_le_bytes()).collect();
+    bench.iter(|| {
+        std::hint::black_box(Mphf::new(2.0, &items));
+    });
+}
+
+#[allow(dead_code)]
+fn build1_par_u64(bench: &mut Bencher) {
+    let items: Vec<u64> = (0..1000000u64).map(|x| x * 2).collect();
+    #[cfg(feature = "parallel")]
     bench.iter(|| {
-        let items: Vec<u64> = (0..1000000u64).map(|x| x * 2).collect();
-        let _ = Mphf::new(2.0, &items);
+        std::hint::black_box(Mphf::new_parallel(2.0, &items, None));
     });
 }
 
 #[allow(dead_code)]
-fn build1_par(bench: &mut Bencher) {
+fn build1_par_slices(bench: &mut Bencher) {
+    let items: Vec<[u8; 8]> = (0..1000000u64).map(|x| (x * 2).to_le_bytes()).collect();
     #[cfg(feature = "parallel")]
     bench.iter(|| {
-        let items: Vec<u64> = (0..1000000u64).map(|x| x * 2).collect();
-        let _ = Mphf::new_parallel(2.0, &items, None);
+        std::hint::black_box(Mphf::new_parallel(2.0, &items, None));
     });
 }
 
@@ -28,10 +44,10 @@ fn scan1_ser(bench: &mut Bencher) {
 
     bench.iter(|| {
         for i in (0..1000000u64).map(|x| x * 2) {
-            phf.hash(&i);
+            std::hint::black_box(phf.hash(&i));
         }
     });
 }
 
-benchmark_group!(benches, build1_ser, build1_par, scan1_ser);
+benchmark_group!(benches, build1_ser_u64, build1_ser_slices, build1_par_u64, build1_par_slices, scan1_ser);
 benchmark_main!(benches);