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performance optimization of stats code for rank_genes_groups #4204

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performance optimization of stats code for rank_genes_groups #4204

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ca227c5
performance optimization of stats code for rank_genes_groups
zboldyga Jul 8, 2026
27ba8b8
docs: rename release note to PR number
zboldyga Jul 8, 2026
304a1b5
chore: drop stale illico groups TODO (landed in illico 0.6.0)
zboldyga Jul 9, 2026
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3 changes: 3 additions & 0 deletions docs/release-notes/4204.perf.md
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Speed up {func}`scanpy.tl.rank_genes_groups` `vs_rest` statistics via a single {func}`scanpy.get.aggregate` pass with [Chan's][] cancellation-free leave-one-out variance {smaller}`Z Boldyga`

[Chan's]: https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Parallel_algorithm
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