Benchmark: Setting Canvas Pixel

HTML Preparation code:

<canvas id="c" width="800" height="800"></canvas>

Script Preparation code:

$c = document.getElementById('c');
$ctx = $c.getContext('2d');
$ctx.clearRect(0, 0, 800, 800);
$px = $ctx.createImageData(1, 1);
$pxls = [];
for (var i=0; i<10000; ++i) $pxls.push({
   x: Math.random() * 800 << 0,
   y: Math.random() * 800 << 0,
   r: 255,
   g: 0,
   b: 0,
   a: 0
});
$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); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
fillRect/concat
fillRect/join

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser/OS: Chrome 136 on Windows

View result in a separate tab

fillRect/concat

3K/s

fillRect/join

3K/s

View exact numbers

Test name	Executions per second
✓ fillRect/concat	3,311 Ops/sec
fillRect/join	2,985 Ops/sec

Setting Canvas Pixel (version: 0) Benchmark.js

Comparing performance of: `fillRect/concat vs fillRect/join`

Created: 8 years ago by: Guest

Go to the latest result

fillRect/concat

fillRect/join

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Setting Canvas Pixel (version: 0) Benchmark.js

Comparing performance of: fillRect/concat vs fillRect/join

Created: 8 years ago by: Guest

Go to the latest result

fillRect/concat

fillRect/join

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `fillRect/concat vs fillRect/join`