nvd3生活图表内存泄漏[重复]

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                        <a href="/questions/24689157/nvd3-how-to-refresh-the-data-function-to-product-new-data-on-click" dir="ltr">NVD3 - How to refresh the data function to product new data on click</a>
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            <div class="grid--cell mb0 mt8">Closed <span title="2015-07-01 08:18:36Z" class="relativetime">4 years ago</span>.</div>
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I try to create a living line chart. I always show a fixed number of points adding a new one means removing an old one. To do this I use an interval timer to redraw the chart.

This works quite nice until I run the profiler and have a look at the memory consumption. This chart consumes a lot of memory and more and more for every step. I cannot see an obvious reason because the data is shift() out of the array after a new value is push() in.

var data = [{
    "key" : "Long",
    "values" : getData()
}];
var chart;

function redraw() {

    nv.addGraph(function() {
        var chart = nv.models.lineChart().margin({
            left : 100
        })
        //Adjust chart margins to give the x-axis some breathing room.
        .useInteractiveGuideline(true) //We want nice looking tooltips and a guideline!
        //.transitionDuration(350) //how fast do you want the lines to transition?
        .showLegend(true) //Show the legend, allowing users to turn on/off line series.
        .showYAxis(true) //Show the y-axis
        .showXAxis(true);

        //Show the x-axis
        chart.xAxis.tickFormat(function(d) {
            return d3.time.format('%x')(new Date(d))
        });

        chart.yAxis.tickFormat(d3.format(',.1%'));

        d3.select('#chart svg').datum(data)
        //.transition().duration(500)
        .call(chart);

        nv.utils.windowResize(chart.update);
        return chart;
    });
}

function getData() {
    var arr = [];
    var theDate = new Date(2012, 01, 01, 0, 0, 0, 0);
    for (var x = 0; x < 30; x++) {
        arr.push({
            x : new Date(theDate.getTime()),
            y : Math.random() * 100
        });
        theDate.setDate(theDate.getDate() + 1);
    }
    return arr;
}

setInterval(function() {
    var long = data[0].values;
    var next = new Date(long[long.length - 1].x);
    next.setDate(next.getDate() + 1)
    long.shift();
    long.push({
        x : next.getTime(),
        y : Math.random() * 100
    });
    redraw();
}, 1500);

What's wrong?

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