Run results for: PutImageData vs DrawImage

Run details:

User agent: Mozilla/5.0 (X11; CrOS x86_64 14268.18.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.25 Safari/537.36

Browser: Chrome 96

Operating system: Chrome OS 14268.18.0

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
DrawImage whole master into di canvas	400301.7 Ops/sec
PutImageData whole master into pid canvas	19786.1 Ops/sec
DrawImage half master into di canvas	337041.9 Ops/sec
PutImageData half master into pid canvas	20908.0 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