pingcap / pingcap/tidb

improve performance in the logicalOptimize

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#61,635 0 comments 0 reactions 0 assignees View on GitHub
type/enhancement
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Description

## Enhancement

https://flamegraph.com/share/66492b21-460e-11f0-9c9f-da4acad57e16

Image

1.The datasource‘s pushdown has done the predicate simplification. Do we need to do it again in the predicate simplification rule.

2. reuse the memory in the predicate simplification.

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