Canvas.toDataURL image type performance (v20)

Revision 20 of this benchmark created on

Description

Tests toDataURL image types with a large canvas

Preparation HTML

<canvas id="canvas" width="1280" height="720" style="width:1280px; height:720px;">
</canvas>

Setup

c = document.getElementById("canvas");
    ctx = c.getContext("2d");
    cpa = ctx.createImageData(1280, 720);
    for (var i = 0; i < 1280 * 720; i++) {
      cpa.data[i * 4 + 0] = Math.round(Math.random() * 255);
      cpa.data[i * 4 + 1] = Math.round(Math.random() * 255);
      cpa.data[i * 4 + 2] = Math.round(Math.random() * 255);
      cpa.data[i * 4 + 3] = 255;
    }
    ctx.putImageData(cpa, 0, 0);

Test runner

Ready to run.

Testing in
TestOps/sec
image data
data = ctx.getImageData(0, 0, 1280, 720);
ready
image/png
// async test
c.toBlob(function(blob) {
  // got blob
  deferred.resolve();
}, "image/png");
ready
image/jpeg 0.2
// async test
c.toBlob(function(blob) {
  // got blob
  deferred.resolve();
}, "image/jpeg", 0.2);
ready
image/jpeg 0.5
// async test
c.toBlob(function(blob) {
  // got blob
  deferred.resolve();
}, "image/jpeg", 0.5);
ready
image/jpeg 0.8
// async test
c.toBlob(function(blob) {
  // got blob
  deferred.resolve();
}, "image/jpeg", 0.8);
ready
image/jpeg 1.0
c.toBlob(function(blob) {
  // got blob
  deferred.resolve();
}, "image/jpeg", 1.0);
ready
image/jpeg 1.0 toDataURL
c.toDataURL("image/jpeg", 1.0);
ready

Revisions

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