Run results for: FIXED! GetImageData with PutImageData vs just DrawImage

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.101 Safari/537.36

Browser: Chrome 87

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
DrawImage whole master into di canvas	478850.3 Ops/sec
PutImageData whole master into pid canvas	9008.5 Ops/sec
DrawImage half master into di2 canvas	446704.6 Ops/sec
PutImageData half master into pid2 canvas	8828.5 Ops/sec

HTML Preparation code:

master
<canvas id='master' width='100' height='100'></canvas>
<canvas id='pid' width='100' height='100'></canvas>pid1
<canvas id='di' width='100' height='100'></canvas>di1
<canvas id='pid2' width='100' height='100'></canvas>pid2
<canvas id='di2' width='100' height='100'></canvas>di2

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');
var pid2 = document.getElementById('pid2').getContext('2d');
var di2 = document.getElementById('di2').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 di2 canvas
di2.drawImage(master,25,0,50,100,25,0,50,100);
PutImageData half master into pid2 canvas
let imgDatas = masterctx.getImageData(25,0,50,100); pid2.putImageData(imgDatas,25,0);

Run results for: FIXED! GetImageData with PutImageData vs just DrawImage

v2

DrawImage whole master into di canvas

PutImageData whole master into pid canvas

DrawImage half master into di2 canvas

PutImageData half master into pid2 canvas