render-vs-prerender

JavaScript performance comparison

Revision 58 of this test case created by Aszalós Gábor

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 = 150;
  can2.height = 150;
  var ctx2 = can2.getContext('2d');

  ctx2.beginPath();
  ctx2.strokeStyle = 'red';
  ctx2.lineWidth = 4;
  ctx2.moveTo(10, 10);
  ctx2.lineTo(10, 30);
  ctx2.lineTo(30, 30);
  ctx2.lineTo(40, 70);
  ctx2.quadraticCurveTo(72, 43, 22, 12);
  ctx2.quadraticCurveTo(12, 43, 12, 102);
  ctx2.stroke();
</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
render 
ctx.rotate(0.3);
ctx.beginPath();
ctx.strokeStyle = 'red';
ctx.lineWidth = 4;
ctx.moveTo(10, 10);
ctx.lineTo(10, 30);
ctx.lineTo(30, 30);
ctx.lineTo(40, 70);
ctx.quadraticCurveTo(72, 43, 22, 12);
ctx.quadraticCurveTo(12, 43, 12, 102);
ctx.stroke();
 pending…
pre-rendered 
ctx.rotate(0.3);
ctx.drawImage(can2, 0, 300);
 pending…

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