Backport PR #2121 on branch 0.12.x (perf: use name in map_blocks to bypass tokenization)

[meeseeksmachine]

Backport PR #2121: perf: use name in map_blocks to bypass tokenization

[scverse-benchmark]

Benchmark changes

Change	Before [124f183]	After [a4543a1]	Ratio	Benchmark (Parameter)
-	741±40ms	212±10ms	0.29	dataset2d.Dataset2D.time_concat('h5ad', (-1,), 'cat')
-	651±2ms	210±1ms	0.32	dataset2d.Dataset2D.time_concat('h5ad', None, 'cat')
-	1.09±0.01s	491±80ms	0.45	dataset2d.Dataset2D.time_concat('zarr', (-1,), 'cat')
-	1.07±0s	542±5ms	0.5	dataset2d.Dataset2D.time_concat('zarr', None, 'cat')
+	1.97±0.02ms	2.26±0ms	1.15	dataset2d.Dataset2D.time_full_to_memory('h5ad', (-1,), 'cat')
+	1.98±0.01ms	2.25±0.06ms	1.14	dataset2d.Dataset2D.time_full_to_memory('h5ad', None, 'cat')
-	16.2±0.4ms	14.1±0.3ms	0.87	dataset2d.Dataset2D.time_getitem_slice('h5ad', None, 'numeric')
-	34.8±1ms	29.7±0.8ms	0.85	sparse_dataset.SparseCSRContiguousSlice.time_getitem('0:9000', False)

Comparison: https://github.com/scverse/anndata/compare/124f1835e73a0f403fbaef8a657c441c5bf5fd4c..a4543a1c981c6b1ff2a5b588e79f081b73a8bdde
Last changed: Fri, 31 Oct 2025 16:24:50 +0000

More details: https://github.com/scverse/anndata/pull/2191/checks?check_run_id=54200336973