translate3d vs translate XY vs css left/top

JavaScript performance comparison

Revision 27 of this test case created by ikarienator

Preparation code

<div id="elem" style="position: absolute; background:#ccc; width:10px; height:10px;"></div>
<script>
  var elem = document.getElementById("elem");
  var style = elem.style;
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
translate3d
var x = y = 0;
for (var i = 100; i--;) {
 x = i;
 y = i * 5;

 style.WebkitTransform = 'translate3d(' + x + 'px, ' + y + 'px, 0)';
 elem._width = elem.offsetWidth; // force reflow
}
pending…
translateX/Y
var x = y = 0;
for (var i = 100; i--;) {
 x = i;
 y = i * 5;

 style.WebkitTransform = 'translateX(' + x + 'px) translateY(' + y + 'px)';
 elem._width = elem.offsetWidth; // force reflow

}
pending…
css left/top
var x = y = 0;
for (var i = 100; i--;) {
 x = i;
 y = i * 5;
 style.left = x + 'px';
 style.top = y + 'px';
 elem._width = elem.offsetWidth; // force reflow
}
pending…
css height/width
var x = y = 0;
for (var i = 100; i--;) {
 x = i;
 y = i * 5;
 style.width = x + 'px';
 style.height = y + 'px';
 elem._width = elem.offsetWidth; // force reflow
}
pending…
matrix
var x = y = 0;
for (var i = 100; i--;) {
 x = i;
 y = i * 5;

 style.WebkitTransform = 'matrix(1,0,0,1,' + x + ',' + y + ')';
 elem._width = elem.offsetWidth; // force reflow

}
pending…
matrix3d
var x = y = 0;
for (var i = 100; i--;) {
 x = i;
 y = i * 5;

 style.WebkitTransform = 'matrix3d(1,0,0,0,0,1,0,0,0,0,1,0,' + x + ',' + y + ',0,1)';
 elem._width = elem.offsetWidth; // force reflow

}
pending…

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