Yurunsoft opened a new issue, #20618:
URL: https://github.com/apache/echarts/issues/20618

   ### What problem does this feature solve?
   
   我们的需求场景有2个:
   1. 16个温度曲线渲染在单独的dom中,每个曲线最多可能有30000个点,每1s刷新一次数据
   2. 3条曲线渲染在单独的dom中,其中2条曲线最多可能有30000个点,第3条曲线最多可能有60000个点,每500ms刷新一次数据
   
   场景 1 要求尽量不丢失细节,对高低温位置比较敏感。目前用 5.6.0-rc.1 的新 minmax 算法,放大后可能和不采样时有所出入。
   场景 2 用 5.6.0-rc.1 的新 minmax 算法基本满足需求了。
   
   建议开启采样后,如果放大了,缩放后展示区域的点数<=最大能渲染的点数,就使用原始数据去渲染。
   
   或者可以根据放大缩小倍数,动态采样,这样能更好保留细节。
   
   ### What does the proposed API look like?
   
   不改变 API,或者增加可配置项。


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