executor: Optimize statement summary performance by avoiding heap memory allocation

[crazycs520]

What problem does this PR solve?

Issue Number: ref #56649

Problem Summary: Optimize executor runtime stats by avoid unnecessary clone.

What changed and how does it work?

Before:

This PR:

version	workload	thread	QPS	QPS Increase
master	oltp_point_select	100	86812
This PR	oltp_point_select	100	88622	2.0%

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[tiprow]

Hi @crazycs520. Thanks for your PR.

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[codecov]

Codecov Report

Attention: Patch coverage is 91.20000% with 11 lines in your changes missing coverage. Please review.

Project coverage is 74.1887%. Comparing base (8c88823) to head (69c4101).
Report is 27 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #58023        +/-   ##
================================================
+ Coverage   73.1477%   74.1887%   +1.0409%     
================================================
  Files          1674       1676         +2     
  Lines        461685     467559      +5874     
================================================
+ Hits         337712     346876      +9164     
+ Misses       103209      99976      -3233     
+ Partials      20764      20707        -57     

Flag	Coverage Δ
integration	43.9992% <68.0000%> (?)
unit	72.9171% <91.2000%> (+0.6380%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	46.2574% <ø> (+0.2620%)	⬆️

[cfzjywxk]

LGTM

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-12-10 12:06:33.592476599 +0000 UTC m=+353783.681279141: ☑️ agreed by zyguan.
• 2024-12-11 11:49:58.108973526 +0000 UTC m=+439188.197776067: ☑️ agreed by cfzjywxk.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cfzjywxk, yudongusa, zyguan

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• OWNERS [cfzjywxk,zyguan]
• pkg/sessionctx/variable/OWNERS [yudongusa]

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