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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

DrawImage whole master into di canvas

746K/s

DrawImage half master into di2 canvas

509K/s

PutImageData half master into pid2 canvas

33K/s

PutImageData whole master into pid canvas

21K/s

View exact numbers

Test name	Executions per second
✓ DrawImage whole master into di canvas	746,385 Ops/sec
DrawImage half master into di2 canvas	509,058 Ops/sec
PutImageData half master into pid2 canvas	32,563 Ops/sec
PutImageData whole master into pid canvas	20,952 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