alex2wong commented on issue #12023: Lags when using timeline with many (> 100) items with SVG rendering URL: https://github.com/apache/incubator-echarts/issues/12023#issuecomment-576316328 Sure，I've checked in demo code. The path elements for SVG are in DOM tree indeed, which introduce some performance issue. I am not sure how much performance we can promote by not render path for 'none' symbol or symbol with 0 opacity. Maybe there are some reason we keep the paths as placeholder? @Ovilia
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