render-vs-prerender

JavaScript performance comparison

Revision 108 of this test case created by

Preparation code

<canvas id="canvas1" width="500" height="500"></canvas>
<script>
  var can = document.getElementById('canvas1');
  var ctx = can.getContext('2d');
  
  var can2 = document.createElement('canvas');
  can2.width = 20;
  can2.height = 20;
  var ctx2 = can2.getContext('2d');
  ctx2.fillRect(0, 0, 20, 20);

</script>
    

Preparation code output

<canvas id="canvas1" width="500" height="500"></canvas>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
fill rect
for (i = 0; i++; i < 1000) {
  var x = Math.random() * 500;
  var y = Math.random() * 500;
  ctx2.fillRect(x, y, 20, 20);
}
    
pending…
drawImage
for (var i = 0; i++; i < 1000) {
  var x = Math.random() * 500;
  var y = Math.random() * 500;
  ctx.drawImage(can2, x, y, 10, 10);
}
    
    
pending…

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