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The mouse tracking feature on Highcharts is slower on chrome but not slow on firefox or IE

We have a webapp built using Codeigniter and PHP that uses the Highcharts library and javascript / html on the client side and is deployed to IIS.

The Highcharts library displays various graphs on the screen, more precisely, 5. Each diagram displays data with no more than 1000 lines.

The graphs are built perfectly, but when the mouse hangs around the diagram, the mouse is displayed in frames (only on chrome). See the image below for frame delays caused by mouse tracking.

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Surprisingly, this behavior is observed only on chrome, but not in IE or firefox.

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Highcharts 2.0.4, 4.0.4

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            formatter: function() {
                        return 'The value for <b>' + this.x + '</b> is <b>' + this.y + '</b>, in series '+ this.series.name;
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            content: "Add";
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    </table>

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