Is it normal for TiDB CDC to have a latency of around 2 seconds when synchronizing to downstream TiDB?

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This topic has been translated from a Chinese forum by GPT and might contain errors.

Original topic: tidb cdc 同步到下游的tidb，延时在2s左右，正常吗？

| username: leo_zxl

【TiDB Usage Environment】Production\Testing Environment\POC
【TiDB Version】5.2.4
When using MySQL before, master-slave synchronization was around 1 second, but CDC is slower than MySQL.

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| username: HACK | Original post link

Has it always been 2 seconds?

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| username: leo_zxl | Original post link

1 second to more than 2 seconds

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| username: 特雷西-迈克-格雷迪 | Original post link

The latency of DM is approximately 400ms, using SSD.

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| username: buchuitoudegou | Original post link

The scenarios for DM and CDC are different, so they cannot be compared in this way.

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| username: asddongmen | Original post link

This synchronization delay is quite normal.