[GitHub] 799677446 opened a new issue #9106: datazoom拖拽能否像highcharts根据拖拽的长度变更周期，从而提升拖拽的性能？

[GitBox <gi...@apache.org>]

799677446 opened a new issue #9106: datazoom拖拽能否像highcharts根据拖拽的长度变更周期，从而提升拖拽的性能？
URL: https://github.com/apache/incubator-echarts/issues/9106
 
 
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   ### One-line summary [问题简述]
   
   现在总共有24000多条数据，拖拽超过一半会变得比较卡
   
   
   
   
   
   ### Version & Environment [版本及环境]
   + ECharts version [ECharts 版本]: 4.0.1
   + Browser version [浏览器类型和版本]:  chrome  69.0.3497.100
   + OS Version [操作系统类型和版本]: 
   
   
   
   
   
   ### Expected behaviour [期望结果]
   看了highcharts的demo: https://www.hcharts.cn/demo/highstock/candlestick-and-volume
   想问下能否像highcharts，不用渲染太多指标从而提高性能
   
   
   
   ### ECharts option [ECharts配置项]
   <!-- Copy and paste your 'echarts option' here. -->
   <!-- [下方贴你的option，注意不要删掉下方 ```javascript 和 尾部的 ``` 字样。最好是我们能够直接运行的 option。如何得到能运行的 option 参见上方的 guidelines for contributing] -->
   ```javascript
   option = {
      backgroundColor: '#1A253A',
               tooltip: {
                   trigger: 'axis',
                   axisPointer: {
                       type: 'cross'
                   },
                   backgroundColor: 'rgba(48,  69,  95, 0.97)',
                   borderWidth: 1,
                   borderColor: '#000',
                   textStyle: {
                       color: '#8EA5BF'
                   },
              },
               toolbox: {
                   show: false,
                   feature: {
                       dataZoom: {
                           yAxisIndex: false
                       },
                       brush: {
                           type: ['lineX', 'clear']
                       }
                   }
               },
               xAxis: {
                   type: 'category',
                   data: [],
                   scale: true,
                   boundaryGap: false,
                   axisLine: {
                       onZero: false,
                       show: false
                   },
                   splitLine: { show: false },
                  axisTick: {
                       show: false
                   },
                   splitNumber: 20,
                   min: 'dataMin',
                   max: 'dataMax',
                   axisPointer: {
                       z: 100,
                       lineStyle: {
                           type: 'dashed',
                           color: '#3179ca'
                       },
                       label: this.commonLabel
                   }
               },
               datazoom: [
    {
                   type: 'inside',
                   show: true,
                   xAxisIndex: 0,
                   startValue: data.dates.slice(-90)[0],
                   endValue: data.dates[data.dates.length - 1]
               },
               {
                   type: 'slider',
                   show: true,
                   xAxisIndex: 0,
                   startValue: data.dates.slice(-90)[0],
                   endValue: data.dates[data.dates.length - 1],
                   top: '86%',
                   height: '30',
                   realtime: false,
               }],
               yAxis: {
                   scale: true,
                   splitLine: {
                       show: true,
                       lineStyle: {
                           type: 'solid',
                           color: '#2a344a'
                       }
                   },
                   axisPointer: {
                       show: true,
                       lineStyle: {
                           type: 'dashed',
                           color: '#3179ca'
                       },
                   },
                   axisLine: {
                       show: false
                   },
                   axisTick: {
                       show: false
                   },
              },
               grid: {
                   top: 50,
                   left: '10%',
                   right: '8%',
                   height: '60%'
               },
               series: [
                   {
                       type: 'candlestick',
                       name: '日K',
                       data: [],
                       itemStyle: {
                           normal: {
                               color: 'transparent',
                               color0: '#0CF49B',
                               borderColor: '#FD1050',
                               borderColor0: '#0CF49B'
                           }
                       }
                   }
               ]
   }
   
   ```
   
   
   
   
   ### Other comments [其他信息]
   <!-- For example: Screenshot or Online demo -->
   <!-- [例如，截图或线上实例 (JSFiddle/JSBin/Codepen)] -->
   
   

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