Run results for: PutImageData vs DrawImage

Run details:

User agent: Mozilla/5.0 (iPad; CPU OS 16_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/115.0.5790.130 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 115

Operating system: iOS 16.3

Device Platform: Tablet

Date tested: one year ago

Test name	Executions per second
DrawImage whole master into di canvas	155321.7 Ops/sec
PutImageData whole master into pid canvas	6076.7 Ops/sec
DrawImage half master into di canvas	176940.4 Ops/sec
PutImageData half master into pid canvas	7395.3 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);

Tests:

DrawImage whole master into di canvas
di.drawImage(master,0,0);
PutImageData whole master into pid canvas
let imgData = masterctx.getImageData(0,0,100,100); pid.putImageData(imgData,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
let imgData = masterctx.getImageData(25,0,75,100); pid.putImageData(imgData,25,0);

Run results for: PutImageData vs DrawImage

GetImageData with 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