Ling Jin comments

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                                            Ling Jin

mounter(ticdc): optimize mounter cpu usage by reduce memory allocation on map and slice

> The metrics is lost, since I use continous profiling which delete metrics data each 3 hours. > > On the master branch, we can see obvious `makemap` called inside...

[DNM] consumer(ticdc): query row checksum from the tidb

/retest

[DNM] consumer(ticdc): query row checksum from the tidb

/retest

[DNM] consumer(ticdc): query row checksum from the tidb

/retest

cdc: filter events with the observed range before load old values

/cherry-pick release-8.1

model(ticdc): remove table id from the table name struct to reduce code complexity

/retest

kafka(ticdc): fix kafka consumer doesn't check partition and old message

/ok-to-test

kafka(ticdc): fix kafka consumer doesn't check partition and old message

/retest

kafka(ticdc): fix kafka consumer doesn't check partition and old message

/check-issue-triage-complete

query information_schema.ddl_jobs is very slow

ref https://github.com/pingcap/tiflow/issues/11521