Run results for: setFont measureText OffscreenCanvas vs Canvas

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Offscreen font

13.0M/s

Canvas textBaseline

12.6M/s

Offscreen textAlign

12.6M/s

Canvas textAlign

12.2M/s

Offscreen textBaseline

11.7M/s

Canvas font

3.3M/s

Offscreen

1.4M/s

Canvas

1.3M/s

View exact numbers

Test name	Executions per second
✓ Offscreen font	12,994,605 Ops/sec
Canvas textBaseline	12,632,950 Ops/sec
Offscreen textAlign	12,585,115 Ops/sec
Canvas textAlign	12,202,393 Ops/sec
Offscreen textBaseline	11,686,176 Ops/sec
Canvas font	3,337,682 Ops/sec
Offscreen	1,408,524 Ops/sec
Canvas	1,335,476 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";