Run results for: setFont measureText OffscreenCanvas vs Canvas

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Offscreen font

34.1M/s

Canvas textAlign

31.7M/s

Offscreen textAlign

30.5M/s

Canvas textBaseline

29.2M/s

Offscreen textBaseline

28.6M/s

Canvas font

3.8M/s

Offscreen

598K/s

Canvas

585K/s

View exact numbers

Test name	Executions per second
✓ Offscreen font	34,112,716 Ops/sec
Canvas textAlign	31,692,402 Ops/sec
Offscreen textAlign	30,515,926 Ops/sec
Canvas textBaseline	29,203,690 Ops/sec
Offscreen textBaseline	28,583,540 Ops/sec
Canvas font	3,783,669 Ops/sec
Offscreen	597,672 Ops/sec
Canvas	585,264 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";