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(*HashAggExec).initForParallelExec is too slow #53898

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hawkingrei opened this issue Jun 9, 2024 · 0 comments · Fixed by #54127
Closed

(*HashAggExec).initForParallelExec is too slow #53898

hawkingrei opened this issue Jun 9, 2024 · 0 comments · Fixed by #54127
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type/enhancement The issue or PR belongs to an enhancement.

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Enhancement

(*HashAggExec).initForParallelExec is too slow. and it take many time to alloc the memory for Chunk.

https://flamegraph.com/share/7c32d2ec-2648-11ef-aba3-6a3d1814cbe4

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executor: reduce memory allocation in the initialization of hash agg executor xzhangxian1008/tidb
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@hawkingrei