perf/mouse-event.html

<body>
<script src="../resources/magnitude-perf.js"></script>
<style>
    .outer {
        position: relative;
        margin: 0.25px;
        padding: 0.25px;
    }
    .inner {
        width: 100px;
        height: 100px;
        background: red;
    }
</style>
<div id="test"></div>
<script>

var innerElement, reportedPosition;
var testElement = document.getElementById('test');

function setupFunction(magnitude)
{
    testElement.innerHTML = '';
    var element, parent = testElement;
    for (var i = 0; i < magnitude; i++) {
        element = document.createElement('div');
        element.className = 'outer';
        parent.appendChild(element);
        parent = element;
    }
    element = document.createElement('div');
    element.className = 'inner';
    parent.appendChild(element);
    element.onmouseover = function(e) {
        reportedPosition = e.offsetX + ', ' + e.offsetY;
    };
    innerElement = element;
}

function test(magnitude)
{
    if (window.eventSender) {
        var rect = innerElement.getBoundingClientRect();
        eventSender.mouseMoveTo(0, 0);
        eventSender.mouseMoveTo(rect.left, rect.top);
        eventSender.mouseMoveTo(0, 0);
    }
}

Magnitude.description("Tests that mouse event dispatch is linear with respect to the number of parent elements.");
Magnitude.run(setupFunction, test, Magnitude.LINEAR);
</script>
</body>