Setting Canvas Pixel
Date tested:
one year ago
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36
Test name
Executions per second
fillRect/concat
759.5 Ops/sec
fillRect/join
693.7 Ops/sec
1×1 Image Data
77.6 Ops/sec
Benchmark definition (click to collapse):
HTML Preparation code:
<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, r: Math.random() * 255 << 0, g: Math.random() * 255 << 0, b: Math.random() * 255 << 0, a: Math.random() * 128 << 0 + 128 }); $i = 0;
Tests:
fillRect/concat
for (var i=500;i--;){ var px = $pxls[$i++ % 10000]; $ctx.fillStyle = 'rgba(' + px.r + ',' + px.g + ',' + px.b + ',' + (px.a / 255) + ')'; $ctx.fillRect(px.x, px.y, 1, 1); }
fillRect/join
for (var i=500;i--;){ var px = $pxls[$i++ % 10000]; $ctx.fillStyle = 'rgba(' + [px.r,px.g,px.b,px.a/255].join() + ')'; $ctx.fillRect(px.x, px.y, 1, 1); }
1×1 Image Data
for (var i=500;i--;){ var px=$pxls[$i++ % 10000], d=$px.data; d[0] = px.r; d[1] = px.g; d[2] = px.b; d[3] = px.a; $ctx.putImageData($px, px.x, px.y); }
Open this result on MeasureThat.net