PR#8608 may cause 10.0% performance regression in benchmarksql

[owlsome2501]

Bug Report

What did you do?

1. Deploy a cluster with 3 TiDB and 3 Tikv.
2. Run benchmark benchmarksql (benchmarksql-1k).

What did you expect to see?

No performance regression.

What did you see instead?

#8608 caused QPS regression 10.03% in benchmark benchmarksql (benchmarksql-1k) compared to baseline 60193.12.

description	tidb	tikv	pd	QPS
last success	pingcap/tidb@a6c83ba	tikv/tikv@d0c738a	e27e55b	58850.23
first regression	pingcap/tidb@a6c83ba	tikv/tikv@d0c738a	8949567	54155.46

What version of PD are you using?

8949567

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[rleungx]

8949567 only updates the go module of tools which doesn't affect the PD. As for regression issue, we are retring to find the correct commit.