Run results for: PutImageData vs DrawImage without GetImageData

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser: Chrome 116

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
DrawImage whole master into di canvas	143625.6 Ops/sec
PutImageData whole master into pid canvas	13449.4 Ops/sec
DrawImage half master into di canvas	148479.5 Ops/sec
PutImageData half master into pid canvas	16387.9 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);

var imgDataFull = masterctx.getImageData(0,0,100,100);
var imgDataHalf = masterctx.getImageData(25,0,75,100);

Tests:

DrawImage whole master into di canvas
di.drawImage(master,0,0);
PutImageData whole master into pid canvas
pid.putImageData(imgDataFull,0,0);
DrawImage half master into di canvas
di.drawImage(master,25,0,50,100,25,0,50,100);
PutImageData half master into pid canvas
pid.putImageData(imgDataHalf,25,0);

Run results for: PutImageData vs DrawImage without GetImageData

PutImageData vs just DrawImage

DrawImage whole master into di canvas

PutImageData whole master into pid canvas

DrawImage half master into di canvas

PutImageData half master into pid canvas