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/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Canvas textAlign

29.9M/s

Offscreen textAlign

29.4M/s

Offscreen font

29.1M/s

Canvas textBaseline

28.4M/s

Offscreen textBaseline

25.5M/s

Canvas font

3.8M/s

Canvas

2.0M/s

Offscreen

564K/s

View exact numbers

Test name	Executions per second
✓ Canvas textAlign	29,919,110 Ops/sec
Offscreen textAlign	29,352,466 Ops/sec
Offscreen font	29,132,178 Ops/sec
Canvas textBaseline	28,356,156 Ops/sec
Offscreen textBaseline	25,517,222 Ops/sec
Canvas font	3,841,956 Ops/sec
Canvas	1,979,050 Ops/sec
Offscreen	564,007 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";