range: improve performance

[hawkingrei]

What problem does this PR solve?

Issue Number: close #xxx

Problem Summary:

What changed and how does it work?

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

[codecov[bot]]

Codecov Report

:x: Patch coverage is 80.00000% with 2 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 73.4666%. Comparing base (e8aa60d) to head (c76d4fc). :warning: Report is 787 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #61300        +/-   ##
================================================
+ Coverage   73.0655%   73.4666%   +0.4010%     
================================================
  Files          1730       1730                
  Lines        481483     481499        +16     
================================================
+ Hits         351798     353741      +1943     
+ Misses       108134     106208      -1926     
+ Partials      21551      21550         -1     

Flag	Coverage Δ
integration	42.3286% <80.0000%> (?)

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

Components	Coverage Δ
dumpling	52.7804% <ø> (ø)
parser	∅ <ø> (∅)
br	46.6949% <ø> (+0.0078%)	:arrow_up:

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[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lance6716

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• ~~OWNERS~~ [lance6716]

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[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2025-06-16 06:19:23.517950336 +0000 UTC m=+79816.241129319: :ballot_box_with_check: agreed by lance6716.

[ti-chi-bot[bot]]

[FORMAT CHECKER NOTIFICATION]

Notice: To remove the do-not-merge/needs-linked-issue label, please provide the linked issue number on one line in the PR body, for example: Issue Number: close #123 or Issue Number: ref #456.

_{:open_book: For more info, you can check the "Contribute Code" section in the development guide.}

---

Notice: To remove the do-not-merge/needs-tests-checked label, please finished the tests then check the finished items in description.

For example:

Tests

• [x] Unit test
• [ ] Integration test
• [ ] Manual test (add detailed scripts or steps below)
• [ ] No code

_{:open_book: For more info, you can check the "Contribute Code" section in the development guide.}

[tiprow[bot]]

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

Test name	Commit	Details	Required	Rerun command
fast_test_tiprow	c76d4fca7b5ae66c1df2e2d5aa31680237101762	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.

[ti-chi-bot[bot]]

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

Test name	Commit	Details	Required	Rerun command
idc-jenkins-ci-tidb/unit-test	c76d4fca7b5ae66c1df2e2d5aa31680237101762	link	true	/test unit-test

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.