性能图echarts custom配置项内容和展示

      var data = [];
var dataCount = 10;
var startTime = +new Date();
var categories = ['categoryA', 'categoryB', 'categoryC'];
var types = [
    {name: 'JS Heap', color: '#7b9ce1'},
    {name: 'Documents', color: '#bd6d6c'},
    {name: 'Nodes', color: '#75d874'},
    {name: 'Listeners', color: '#e0bc78'},
    {name: 'GPU Memory', color: '#dc77dc'},
    {name: 'GPU', color: '#72b362'}
];

// Generate mock data
categories.forEach(function (category, index) {
    var baseTime = startTime;
    for (var i = 0; i < dataCount; i++) {
        var typeItem = types[Math.round(Math.random() * (types.length - 1))];
        var duration = Math.round(Math.random() * 10000);
        data.push({
            name: typeItem.name,
            value: [
                index,
                baseTime,
                baseTime += duration,
                duration
            ],
            itemStyle: {
                normal: {
                    color: typeItem.color
                }
            }
        });
        baseTime += Math.round(Math.random() * 2000);
    }
});

function renderItem(params, api) {
    var categoryIndex = api.value(0);
    var start = api.coord([api.value(1), categoryIndex]);
    var end = api.coord([api.value(2), categoryIndex]);
    var height = api.size([0, 1])[1] * 0.6;

    var rectShape = echarts.graphic.clipRectByRect({
        x: start[0],
        y: start[1] - height / 2,
        width: end[0] - start[0],
        height: height
    }, {
        x: params.coordSys.x,
        y: params.coordSys.y,
        width: params.coordSys.width,
        height: params.coordSys.height
    });

    return rectShape && {
        type: 'rect',
        transition: ['shape'],
        shape: rectShape,
        style: api.style()
    };
}


option = {
    tooltip: {
        formatter: function (params) {
            return params.marker + params.name + ': ' + params.value[3] + ' ms';
        }
    },
    title: {
        text: '2021-9-10 性能分析',
        left: 'center'
    },
    dataZoom: [{
        type: 'slider',
        filterMode: 'weakFilter',
        showDataShadow: false,
        top: 10,
        labelFormatter: ''
    }, {
        type: 'inside',
        filterMode: 'weakFilter'
    }],
    grid: {
        height: 300
    },
    xAxis: {
        min: startTime,
        scale: true,
        axisLabel: {
            formatter: function (val) {
                return (Math.max(0, val - startTime)) + 'ms';
            }
        }
    },
    yAxis: {
        data: categories
    },
    series: [{
        type: 'custom',
        renderItem: renderItem,
        itemStyle: {
            opacity: 0.8
        },
        encode: {
            x: [1, 2],
            y: 0
        },
        data: data
    }]
};