fix: stop pre-allocating and undercounting a hash table per COUNT(DISTINCT) group - #24857

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adriangb wants to merge 7 commits into

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claude/bytes-map-initial-capacity-accounting

Commits on Sep 3, 2026

fix: report the real hashbrown allocation from ArrowBytesMap and ArrowBytesViewMap
adriangb
committed
ca7a86a
perf: stop pre-allocating a hash table per COUNT(DISTINCT) group
adriangb
committed
8b2f712
refactor: name the hash table term in ArrowBytesViewMap::size
adriangb
committed
7cccdd2
fix: release the group values map allocations in `clear_shrink`
adriangb
committed
a4f43dc
test: memory limit test for grouped `COUNT(DISTINCT <string>)`
adriangb
committed
b0cd6fb
test: keep the memory limit tests off the single-distinct rewrite
adriangb
committed
e55a3aa
fix: grow the value buffer on a power of two ladder
adriangb
committed
f31fc51