render-vs-prerenderbis

JavaScript performance comparison

Revision 64 of this test case created

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 = 100;
  can2.height = 201;
  var ctx2 = can2.getContext('2d');
 

 
     
     
  function newImage(src){
    var tmp = new Image();
    tmp.src = src;
    return tmp;
}
var im = newImage("http://www.placehold.it/100x100");
ctx2.drawImage(im,0,0);
ctx2.drawImage(im,0,101);
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
render
ctx.clearRect(0,0,500,500);
ctx.drawImage(im,0,0);
ctx.drawImage(im,0,101);
ctx.drawImage(im,0,0);
ctx.drawImage(im,0,101);
ctx.drawImage(im,0,0);
ctx.drawImage(im,0,101);
ctx.drawImage(im,0,0);
ctx.drawImage(im,0,101);
pending…
pre-rendered
ctx.clearRect(0,0,500,500);
ctx.drawImage(can2, 0, 0);
ctx.drawImage(can2, 0, 0);
ctx.drawImage(can2, 0, 0);
ctx.drawImage(can2, 0, 0);
   
   
pending…

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