内存泄露，移动端使用后卡顿

[tiasen]

One-line summary [问题简述]

ionic使用echarts后(测试非ionic使用也会出现相同问题)，内存泄露（如图），单个页面图表多的话，导致移动端页面非常卡顿

Version & Environment [版本及环境]

• ECharts version [ECharts 版本]:3.8.3
• Browser version [浏览器类型和版本]:webview
• OS Version [操作系统类型和版本]:Android/IOS

Expected behaviour [期望结果]

页面绘制结束后，内存不再增长，保证性能

ECharts option [ECharts配置项]

option ={
    "grid": {
        "top": 50,
        "bottom": 50
    },
    "radar": {
        "name": {
            "textStyle": {
                "color": "#fff"
            },
            "fontSize": 10
        },
        "indicator": [
            {
                "name": "总收入",
                "min": 0,
                "max": 1.0402
            }, {
                "name": "邮政申诉率",
                "min": 0,
                "max": 0.5556
            }, {
                "name": "万票有责服务投诉",
                "min": 0,
                "max": 0.5556
            }, {
                "name": "异常网点",
                "min": 0,
                "max": 0.6667
            }, {
                "name": "百万件遗失",
                "min": 0,
                "max": 0.6667
            }, {
                "name": "超3天积压件",
                "min": 0,
                "max": 0.625
            }
        ],
        "splitNumber": 1,
        "splitLine": {
            "show": false
        },
        "splitArea": {
            "areaStyle": {
                "color": "#fff",
                "opacity": 0.2
            }
        },
        "axisLine": {
            "lineStyle": {
                "color": "rgba(255,255,255,0.1)"
            }
        }
    },
    "series": [
        {
            "type": "radar",
            "symbolSize": 0,
            "clockwise": true,
            "lineStyle": {
                "normal": {
                    "width": 1,
                    "type": "dotted"
                }
            },
            "data": [
                {
                    "value": [
                        0.8016,
                        0.5556,
                        0.5519,
                        0.2927,
                        0.3489,
                        0.3915
                    ],
                    "lineStyle": {
                        "normal": {
                            "type": "solid",
                            "width": 1
                        }
                    },
                    "areaStyle": {
                        "normal": {
                            "opacity": 0.4
                        }
                    },
                    "silent": true
                },
                [
                    0.9589,
                    0.4545,
                    0.453,
                    0.3333,
                    0.4,
                    0.4167
                ],
                [
                    1,
                    0.5,
                    0.5,
                    0.5,
                    0.5,
                    0.5
                ],
                [
                    1.0402,
                    0.5556,
                    0.5556,
                    0.6667,
                    0.6667,
                    0.625
                ]
            ]
        }
    ],
    "color": ["#BA55D3", "#ff2222", "rgb(255,216,57) ", "#32db64"]
}

Other comments [其他信息]

[stale]

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