core: batch get region size (#7252)

[ti-chi-bot]

This is an automated cherry-pick of #7252

What problem does this PR solve?

Issue Number: Close #7248.

What is changed and how does it work?

Check List

Tests

• Unit test

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lhy1024
• nolouch

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[codecov]

Codecov Report

Merging #7332 (d140160) into release-7.5 (595d5b0) will increase coverage by 0.00%.
Report is 1 commits behind head on release-7.5.
The diff coverage is 100.00%.

❗ Current head d140160 differs from pull request most recent head d9d4b55. Consider uploading reports for the commit d9d4b55 to get more accurate results

@@             Coverage Diff              @@
##           release-7.5    #7332   +/-   ##
============================================
  Coverage        74.62%   74.63%           
============================================
  Files              442      442           
  Lines            47780    47790   +10     
============================================
+ Hits             35657    35668   +11     
+ Misses            8974     8967    -7     
- Partials          3149     3155    +6     

Flag	Coverage Δ
unittests	74.63% <100.00%> (+<0.01%)	⬆️

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[nolouch]

/merge

[ti-chi-bot]

@nolouch: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: d140160

[ti-chi-bot]

@ti-chi-bot: Your PR was out of date, I have automatically updated it for you.

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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