executor: remove unnecessary memory allocation in (*HashAggExec).initPartialWorkers

[xzhangxian1008]

What problem does this PR solve?

Issue Number: close #52321

Problem Summary:

What changed and how does it work?

no optimization optimization

no optimization flame graph optimization flame graph

Check List

Tests

• [x] 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[bot]]

Hi @xzhangxian1008. Thanks for your PR.

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 74.4476%. Comparing base (cfbabfa) to head (61ddc98). Report is 125 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #52418        +/-   ##
================================================
+ Coverage   72.3769%   74.4476%   +2.0706%     
================================================
  Files          1474       1517        +43     
  Lines        427589     465159     +37570     
================================================
+ Hits         309476     346300     +36824     
- Misses        98890      98921        +31     
- Partials      19223      19938       +715     

Flag	Coverage Δ
integration	48.6013% <100.0000%> (?)
unit	71.9969% <100.0000%> (+0.7368%)	:arrow_up:

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

Components	Coverage Δ
dumpling	53.9957% <ø> (ø)
parser	∅ <ø> (∅)
br	36.5363% <ø> (-4.6730%)	:arrow_down:

[xzhangxian1008]

/cc @XuHuaiyu @hawkingrei

[hawkingrei]

@xzhangxian1008 Can you add some profiler to verify your improvement.

[hawkingrei]

/retest

[xzhangxian1008]

@xzhangxian1008 Can you add some profiler to verify your improvement.

ok

[xzhangxian1008]

/cc @hawkingrei @XuHuaiyu

[xzhangxian1008]

/cc @XuHuaiyu

[xzhangxian1008]

/cc @XuHuaiyu

[xzhangxian1008]

/cc @XuHuaiyu

[xzhangxian1008]

/cc @XuHuaiyu

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, XuHuaiyu

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• ~~OWNERS~~ [XuHuaiyu,hawkingrei]

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[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-04-24 06:39:58.252263172 +0000 UTC m=+155954.992166081: :ballot_box_with_check: agreed by hawkingrei.
• 2024-05-13 02:22:41.706961137 +0000 UTC m=+1447115.464096705: :ballot_box_with_check: agreed by XuHuaiyu.

[tiprow[bot]]

@xzhangxian1008: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
tidb_parser_test	61ddc98561665ef5f3922c27578ad2024742d84b	link	true	/test tidb_parser_test
fast_test_tiprow	61ddc98561665ef5f3922c27578ad2024742d84b	link	true	/test fast_test_tiprow

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.