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pingcap
frontier(ticdc): fast check if region is split or merged when forwarding resolvedTs
What problem does this PR solve?
Issue Number: close #7281
What is changed and how it works?
using map cached all region spans, when forwarding a span, check if it is split or merged by comparing the span start, span end, and region ID.
server CPU and memory:
profile before:
profile after
Check List
Tests
- Unit test
- Integration test
- Manual test (add detailed scripts or steps below)
Questions
Will it cause performance regression or break compatibility?
Do you need to update user documentation, design documentation or monitoring documentation?
Release note
`None`.
[REVIEW NOTIFICATION]
This pull request has been approved by:
- 3AceShowHand
- asddongmen
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