Backport PR #1790 on branch 0.11.x ((performance): speedup for zarr-based sparse indexing)

[meeseeksmachine]

Backport PR #1790: (performance): speedup for zarr-based sparse indexing

[scverse-benchmark]

Benchmark changes

Change	Before [ba06d2a]	After [2ab87c4]	Ratio	Benchmark (Parameter)
-	508±6ms	16.7±0.3ms	0.03	sparse_dataset.SparseCSRContiguousSlice.time_getitem((10000, 10000), ':9000:-1')
-	2.52±0.02s	75.0±2ms	0.03	sparse_dataset.SparseCSRContiguousSlice.time_getitem((10000, 10000), '::-2')
-	525±2ms	55.9±0.7ms	0.11	sparse_dataset.SparseCSRContiguousSlice.time_getitem((10000, 10000), 'alternating')
-	512±3ms	16.0±0.5ms	0.03	sparse_dataset.SparseCSRContiguousSlice.time_getitem((10000, 10000), 'arange')

Comparison: https://github.com/scverse/anndata/compare/ba06d2a905e7694bc84860f5768a20bfe2d16b46..2ab87c47c064e2dec5c43f263360efc365c3c891
Last changed: Tue, 10 Dec 2024 15:06:26 +0000

More details: https://github.com/scverse/anndata/pull/1801/checks?check_run_id=34199100320

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.57%. Comparing base (ba06d2a) to head (2ab87c4).
Report is 2 commits behind head on 0.11.x.

Additional details and impacted files

@@            Coverage Diff             @@
##           0.11.x    #1801      +/-   ##
==========================================
- Coverage   87.04%   84.57%   -2.47%     
==========================================
  Files          40       40              
  Lines        6089     6095       +6     
==========================================
- Hits         5300     5155     -145     
- Misses        789      940     +151     

Files with missing lines	Coverage Δ
src/anndata/_core/sparse_dataset.py	93.63% <100.00%> (+0.12%)	⬆️

... and 8 files with indirect coverage changes