2 Commits

Author	SHA1	Message	Date
Nikita Taranov	100c055510	Prefetching in aggregation (#39304) ... * impl * stash * clean up * do not apply when HT is small * make branch static * also in merge * do not hardcode look ahead value * fix * apply to methods with cheap key calculation * more tests * silence tidy * fix build * support HashMethodKeysFixed * apply during merge only for cheap * stash * fixes * rename method * add feature flag * cache prefetch threshold value * fix * fix * Update HashMap.h * fix typo * 256KB as default l2 size Co-authored-by: Alexey Milovidov <milovidov@clickhouse.com>	2022-09-21 18:59:07 +02:00
Alexey Milovidov	5bdc570046	Improve performance of GROUP BY multiple fixed size keys	2021-02-14 01:56:04 +03:00