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Run results for: Setting Canvas Pixel With Same Color

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.60 Safari/537.36
Chrome 100
Windows
Desktop
3 years ago
Test name Executions per second
fillRect 1459.8 Ops/sec
1×1 Image Data 276.8 Ops/sec
HTML Preparation code:
AخA
 
1
<canvas id="c" width="800" height="300"></canvas>
Script Preparation code:
 
$c = document.getElementById('c');
$ctx = $c.getContext('2d');
$ctx.clearRect(0, 0, 800, 300);
$px = $ctx.createImageData(1, 1);
$pxls = [];
for (var i=0; i<10000; ++i) $pxls.push({
   x: Math.random() * 800 << 0,
   y: Math.random() * 300 << 0
});
$i = 0;
Tests:

  • fillRect

     
    $ctx.fillStyle = 'rgba(128, 128, 128, 1)';
    for (var i=500;i--;){
    var px = $pxls[$i++ % 10000];
    $ctx.fillRect(px.x, px.y, 1, 1);
    }

  • 1×1 Image Data

     
    for (var i=500;i--;){
    var px=$pxls[$i++ % 10000], d=$px.data;
    d[0] = 128;
    d[1] = 128;
    d[2] = 128;
    d[3] = 1;
    $ctx.putImageData($px, px.x, px.y);
    }