DEPR: dropna in pivot_table and crosstab#64759

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jbrockmendel wants to merge 3 commits intopandas-dev:mainfrom

jbrockmendel:depr-53521

Commits on Mar 22, 2026

PERF: Optimize khash usage by eliminating redundant hash+probe operations

jbrockmendel
and
claude
committed
Revert khash.h changes, keep only Cython-level optimizations

jbrockmendel
and
claude
committed
DEPR: dropna in pivot_table and crosstab

jbrockmendel
and
claude
committed