justynabukiel 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-575315261 > 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.` When opacity = 0, 'path' element is still being rendered, I've checked it. > btw, I suppose the performance bottleneck is SVG render, what about if you try Canvas renderer to see if there still exists lags. You are right, the problem is in SVG. I was using Canvas at first and it worked well, but I've decided to change it to SVG, because it's more sharp and looks better. I've also bumped into some flickering issues with Canvas (not relevant here). > And you can try set timeline.symbol = 'none' or timeline.symbolSize = 0, too. I guess symbol = 'none' would not render in DOM for sure ~ I've tried it and checked it once again now. Both these settings, even combined result in creating 'path' element in DOM - just not visible.
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