plainheart commented on issue #16254:
URL: https://github.com/apache/echarts/issues/16254#issuecomment-998476132


   Ahh, I also wonder the reason. 😔 But I've searched many times but found 
nothing useful. In the old 4.x version, there is no throttle so it looks very 
laggy when the mouse moves fast, but one good aspect is that it won't shake 
around. However, in v5, you know, though the `transform` improves a bit, once 
it has `transition`, it will be laggy and shake around if no throttle of 
`50ms`. Moreover, it even behaves differently in different browsers. On the 
contrary, the previous `left/top` position appears better for the throttle of 
`50ms`, in the other words, it behaves "better" as its "worse" positioning 
performance.


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