Run results for: PutImageData vs DrawImage with getImageData in preparation code

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:138.0) Gecko/20100101 Firefox/138.0

Browser: Firefox 138

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

DrawImage whole master into di canvas

456K/s

PutImageData whole master into pid canvas

263K/s

View exact numbers

Test name	Executions per second
✓ DrawImage whole master into di canvas	455,747 Ops/sec
PutImageData whole master into pid canvas	263,149 Ops/sec

HTML Preparation code:

<canvas id='master' width='100' height='100'></canvas>
<canvas id='pid' width='100' height='100'></canvas>
<canvas id='di' width='100' height='100'></canvas>

Script Preparation code:

var master = document.getElementById('master');
var masterctx = master.getContext('2d');
var pid = document.getElementById('pid').getContext('2d');
var di = document.getElementById('di').getContext('2d');

masterctx.fillRect(0,0,50,50);
masterctx.fillStyle = "red";
masterctx.fillRect(50,50,100,100);
let imgData = masterctx.getImageData(0,0,100,100);

Tests:

DrawImage whole master into di canvas
di.drawImage(master,0,0);
PutImageData whole master into pid canvas
pid.putImageData(imgData,0,0);

Run results for: PutImageData vs DrawImage with getImageData in preparation code

GetImageData with PutImageData vs just DrawImage

DrawImage whole master into di canvas

PutImageData whole master into pid canvas