Run results for: PutImageData vs DrawImage without GetImageData

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36

Browser: Chrome 89

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
DrawImage whole master into di canvas	349099.8 Ops/sec
PutImageData whole master into pid canvas	42638.1 Ops/sec
DrawImage half master into di canvas	368127.5 Ops/sec
PutImageData half master into pid canvas	29374.8 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