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-575208302 @justynabukiel After reading some of the doc here https://echarts.apache.org/en/option.html#timeline.itemStyle.opacity and https://echarts.apache.org/en/option.html#timeline.data I believe when set timeline.itemStyle.opacity = 0 would not trigger render of this specific item, since doc said: `and the component will not be drawn when set to 0.` btw, I suppose the performance bottleneck is SVG render, what about if you try Canvas renderer to see if there still exists lags. And you can try set timeline.symbol = 'none' or timeline.symbolSize = 0, too. I guess symbol = 'none' would not render in DOM for sure ~
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