canvas-path

JavaScript performance comparison

Revision 3 of this test case created by Ilmari Heikkinen

Preparation code

<script>
  var c = document.createElement('canvas');
  c.width = c.height = 256;
  var ctx = c.getContext('2d');
</script>

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Testing in unknown unknown
Test Ops/sec
ten
 
ctx.beginPath();
var x = 128,
    y = 128;
ctx.moveTo(x, y);

var n = 10;
for (var j=0; j < 10000/n; j++)
for (var i = 0; i < n; i++) {
 var nx = 128 + Math.cos(i / n * Math.PI * 2);
 var ny = 128 + Math.sin(i / n * Math.PI * 2);
 ctx.bezierCurveTo(x, y, nx, ny, nx, ny);
 x = nx;
 y = ny;
}
ctx.fill();
 pending…
hundred
 
ctx.beginPath();
var x = 128,
    y = 128;
ctx.moveTo(x, y);

var n = 100;
for (var j=0; j < 10000/n; j++)
for (var i = 0; i < n; i++) {
 var nx = 128 + Math.cos(i / n * Math.PI * 2);
 var ny = 128 + Math.sin(i / n * Math.PI * 2);
 ctx.bezierCurveTo(x, y, nx, ny, nx, ny);
 x = nx;
 y = ny;
}
ctx.fill();
 pending…
thousand
 
ctx.beginPath();
var x = 128,
    y = 128;
ctx.moveTo(x, y);

var n = 1000;
for (var j=0; j < 10000/n; j++)
for (var i = 0; i < n; i++) {
 var nx = 128 + Math.cos(i / n * Math.PI * 2);
 var ny = 128 + Math.sin(i / n * Math.PI * 2);
 ctx.bezierCurveTo(x, y, nx, ny, nx, ny);
 x = nx;
 y = ny;
}
ctx.fill();
 pending…
ten thousand
 
ctx.beginPath();
var x = 128,
    y = 128;
ctx.moveTo(x, y);

var n = 10000;
for (var j=0; j < 10000/n; j++)
for (var i = 0; i < n; i++) {
 var nx = 128 + Math.cos(i / n * Math.PI * 2);
 var ny = 128 + Math.sin(i / n * Math.PI * 2);
 ctx.bezierCurveTo(x, y, nx, ny, nx, ny);
 x = nx;
 y = ny;
}
ctx.fill();
 pending…

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