Info

<canvas width="512" height="512" id="canvas" style="border: 1px dashed black;"></canvas>

Preparation code

<canvas width="512" height="512" id="canvas" style="border: 1px dashed black;"></canvas>
<script>
  var classic = new Array(1310720);
  var context = document.getElementById("canvas").getContext("2d");
  var imageData = context.getImageData(0, 0, 512, 512);
  var canvas = imageData.data;
  if (typeof Uint8Array !== 'undefined') {
   var typed8 = new Uint8Array(1310720);
   var typed32 = new Uint32Array(1310720);
  }
  
  for (var i = 0; i < 1310720; ++i) {
   var number = ~~ (Math.random() * 254)
   classic[i] = number;
   canvas[i] = number;
   if (typeof Uint8Array !== 'undefined') {
    typed8[i] = number;
    typed32[i] = number;
   }
  }
  
  context.putImageData(imageData, 0, 0);
</script>

Preparation code output

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

for (var ii = 0; ii < 1310720; ++ii) {
 classic[ii] += 1;
}

for (var ii = 0; ii < 1310720; ++ii) {
 canvas[ii] += 1;
}

if (typeof Uint8Array === 'undefined') {
 throw "Error";
}

for (var ii = 0; ii < 1310720; ++ii) {
 typed8[ii] += 1;
}

if (typeof Uint8Array === 'undefined') {
 throw "Error";
}

for (var ii = 0; ii < 1310720; ++ii) {
 typed32[ii] += 1;
}

Compare results of other browsers

Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by Bruno Garcia on 23rd November 2010
• Revision 2: published by vjeux on 2nd December 2010
• Revision 3: published by vjeux on 2nd December 2010
• Revision 6: published by vjeux on 15th December 2010
• Revision 9: published by vjeux on 15th December 2010
• Revision 10: published by vjeux on 15th December 2010
• Revision 13: published by vjeux on 15th December 2010
• Revision 22: published on 28th August 2011
• Revision 23: published on 13th January 2012
• Revision 25: published on 24th April 2012
• Revision 26: published on 12th July 2012
• Revision 27: published on 17th July 2012
• Revision 28: published on 2nd August 2012
• Revision 29: published on 21st January 2013

0 comments