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

Offscreen font

24.0M/s

Offscreen textAlign

21.2M/s

Canvas textAlign

21.0M/s

Canvas textBaseline

19.7M/s

Offscreen textBaseline

19.7M/s

Canvas font

9.5M/s

Canvas

2.9M/s

Offscreen

509K/s

View exact numbers

Test name	Executions per second
✓ Offscreen font	23,950,950 Ops/sec
Offscreen textAlign	21,237,556 Ops/sec
Canvas textAlign	20,998,236 Ops/sec
Canvas textBaseline	19,698,852 Ops/sec
Offscreen textBaseline	19,667,012 Ops/sec
Canvas font	9,520,294 Ops/sec
Canvas	2,868,999 Ops/sec
Offscreen	509,170 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";