justynabukiel opened a new issue #12023: Lags when using timeline with many (> 100) items with SVG rendering URL: https://github.com/apache/incubator-echarts/issues/12023 ### What problem does this feature solve? When **renderer** is set to **svg** and there are many items in timeline, changing current timeline index lags. There's a visible delay, propably because of many symbols (<path> elements) are rendered in DOM. My usecase is a chart displaying values per weeks. One timeline item is a week and I have few hundereds of weeks. However there are weeks in which I don't have any data and I don't want to display them on timeline. Currentlu there's no possibility not to display them. The only walkaround that I've found is to set opacity = 0 for those items. But that doesn't solve the performance issue, because those items are still rendered in DOM as <path> elements, which causes lagging. ### What does the proposed API look like? In options: timeline: { data: [ { symbol: null } ] } This setting could omit rendering symbol on timeline in function _renderAxisTick() in timeline component. <!-- This issue is generated by echarts-issue-helper. DO NOT REMOVE --> <!-- This issue is in English. DO NOT REMOVE -->
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