Run results for: setFont measureText OffscreenCanvas vs Canvas

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser: Chrome 124

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Canvas textAlign

16.4M/s

Canvas textBaseline

15.3M/s

Offscreen textBaseline

11.8M/s

Offscreen textAlign

11.8M/s

Offscreen font

11.1M/s

Canvas font

7.5M/s

Canvas

2.1M/s

Offscreen

366K/s

View exact numbers

Test name	Executions per second
✓ Canvas textAlign	16,410,288 Ops/sec
Canvas textBaseline	15,263,345 Ops/sec
Offscreen textBaseline	11,845,388 Ops/sec
Offscreen textAlign	11,830,796 Ops/sec
Offscreen font	11,144,880 Ops/sec
Canvas font	7,507,292 Ops/sec
Canvas	2,139,753 Ops/sec
Offscreen	366,096 Ops/sec

Script Preparation code:

var canvas = document.createElement('canvas');
var context = canvas.getContext('2d');

var offscreenCanvas = new OffscreenCanvas(0, 0);
var offscreenContext = offscreenCanvas.getContext('2d');

Tests:

Canvas
context.measureText('M');
Offscreen
offscreenContext.measureText('M');
Canvas font
context.font = 'bold 48px serif';
Offscreen font
offscreenContext.font = 'bold 48px serif';
Canvas textBaseline
context.textBaseline = "hanging";
Offscreen textBaseline
offscreenContext.textBaseline = "hanging";
Canvas textAlign
context.textAlign = "center";
Offscreen textAlign
offscreenContext.textAlign = "center";