Ajaxluo commented on issue #9258: timeline在ie下性能问题 URL: https://github.com/apache/incubator-echarts/issues/9258#issuecomment-433326647 可以在IE10或IE10下打开官方实例： http://www.echartsjs.com/examples/editor.html?c=dynamic-data2 修改以下配置部分： ``` for (var i = 0; i < 80000; i++) { data.push(randomData()); } series: [{ name: '模拟数据', type: 'line', showSymbol: false, hoverAnimation: false, data: data, sampling:'average', areaStyle: { color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{ offset: 0, color: 'rgb(255, 158, 68)' }, { offset: 1, color: 'rgb(255, 70, 131)' }]) }, data: data }] setInterval(function () { for (var i = 0; i < 5; i++) { data.shift(); data.push(randomData()); } myChart.setOption({ series: [{ data: data }] }); }, 2000); ``` 修改完毕后运行，会发现官网上面顶部菜单导航点击事件就会变得卡顿，如果在配置低的IE机器甚至崩溃 在其他谷歌等浏览器均比较流畅。不必对每个x轴时间点都去绘制，准确表示一种趋势即可，有没有对ie再有优化的余地。
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