Canvas Float Point vs Rounded Points

JavaScript performance comparison

Revision 4 of this test case created by 1Pupik1989

Preparation code

<canvas id="c" width="500" height="500"></canvas>
<script>
  Benchmark.prototype.setup = function() {
    var c = document.getElementById('c');
    var ctx = c.getContext('2d');
    var cw = c.width;
    var ch = c.height;
    var rand = function(rMi, rMa){return ~~((Math.random()*(rMa-rMi+1))+rMi);}
  };
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
float
 
var x1 = Math.PI;
var y1 = Math.PI*2;
var x2 = Math.PI*3;
var y2 = Math.PI*4;
ctx.beginPath();
ctx.moveTo(x1,y1);
ctx.lineTo(x2,y2);
ctx.stroke();
 pending…
floor
 
var x1 = Math.PI;
var y1 = Math.PI*2;
var x2 = Math.PI*3;
var y2 = Math.PI*4;
ctx.beginPath();
ctx.moveTo(Math.floor(x1),Math.floor(y1));
ctx.lineTo(Math.floor(x2),Math.floor(y2));
ctx.stroke();
 pending…
newround
 
var x1 = Math.PI;
var y1 = Math.PI*2;
var x2 = Math.PI*3;
var y2 = Math.PI*4;
ctx.beginPath();
ctx.moveTo(~~x1,~~y1);
ctx.lineTo(~~x2,~~y2);
ctx.stroke();
 pending…
<< 0
 
var x1 = Math.PI;
var y1 = Math.PI*2;
var x2 = Math.PI*3;
var y2 = Math.PI*4;
ctx.beginPath();
ctx.moveTo(x1 << 0,y1 << 0);
ctx.lineTo(x2 << 0,y2 << 0);
ctx.stroke();
 pending…
^ 0
 
var x1 = Math.PI;
var y1 = Math.PI*2;
var x2 = Math.PI*3;
var y2 = Math.PI*4;
ctx.beginPath();
ctx.moveTo(x1 ^ 0,y1 ^ 0);
ctx.lineTo(x2 ^ 0,y2 ^ 0);
ctx.stroke();
 pending…

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