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/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Canvas textAlign

33.5M/s

Offscreen textAlign

33.3M/s

Offscreen font

29.9M/s

Canvas textBaseline

29.8M/s

Offscreen textBaseline

29.8M/s

Canvas font

4.9M/s

Canvas

2.2M/s

Offscreen

707K/s

View exact numbers

Test name	Executions per second
✓ Canvas textAlign	33,542,636 Ops/sec
Offscreen textAlign	33,274,896 Ops/sec
Offscreen font	29,889,618 Ops/sec
Canvas textBaseline	29,840,030 Ops/sec
Offscreen textBaseline	29,807,804 Ops/sec
Canvas font	4,864,726 Ops/sec
Canvas	2,200,942 Ops/sec
Offscreen	706,700 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";