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Mon 21 Jul 22:43:21 CEST 2025

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js/dos/ext/vis/examples/timeline/other/performance.html Normal file
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<!DOCTYPE HTML>
<html>
<head>
<title>Timeline | performance</title>
<style>
body, html {
font-family: arial, sans-serif;
font-size: 11pt;
}
</style>
<!-- note: moment.js must be loaded before vis.js, else vis.js uses its embedded version of moment.js -->
<script src="http://cdnjs.cloudflare.com/ajax/libs/moment.js/2.8.4/moment.min.js"></script>
<script src="../../../dist/vis.js"></script>
<link href="../../../dist/vis.css" rel="stylesheet" type="text/css" />
<script src="../../googleAnalytics.js"></script>
</head>
<body>
<p>
Test the performance with a lot of items. The Timeline can load hundreds of thousands of items, but the performance of rendering them in the browser is limited. Rendering typically runs smooth for up to a few hundreds of items at once (you can set a <code>zoomMax</code> to prevent the user from zooming out too far).
</p>
<p>
<label for="count">Number of items</label>
<input id="count" value="10000">
<input id="draw" type="button" value="draw">
</p>
<div id="visualization"></div>
<script>
// create a dataset with items
var now = moment().minutes(0).seconds(0).milliseconds(0);
var items = new vis.DataSet({
type: {start: 'ISODate', end: 'ISODate' }
});
// create data
function createData() {
var count = parseInt(document.getElementById('count').value) || 100;
var newData = [];
var start = now;
for (var i = 0; i < count; i++) {
newData.push({id: i, content: 'item ' + i, start: start + 24*3600*1000 * i}); // much much faster than now.clone add days
}
items.clear();
items.add(newData);
}
createData();
document.getElementById('draw').onclick = createData;
var container = document.getElementById('visualization');
var options = {
editable: true,
start: now.clone().add(-3, 'days'),
end: now.clone().add(11, 'days'),
zoomMin: 1000 * 60 * 60 * 24, // a day
zoomMax: 1000 * 60 * 60 * 24 * 30 * 3 // three months
};
var timeline = new vis.Timeline(container, items, options);
</script>
</body>
</html>