LayoutTests/perf/object-keys.html

<script src="../resources/magnitude-perf.js"></script>
<script>
function setupFunction(magnitude)
{
    obj = {};
    for (var i = 0; i < magnitude; i++) {
        obj[i] = i;
    }
}

function test(magnitude)
{
    Object.keys(obj);
}

Magnitude.initialMagnitude = 8;
Magnitude.numPoints = 6;

Magnitude.description("Tests that Object.keys is linear.");
Magnitude.run(setupFunction, test, Magnitude.LINEAR);
</script>