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/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Offscreen font

12.1M/s

Canvas textAlign

11.4M/s

Offscreen textAlign

11.4M/s

Canvas textBaseline

10.7M/s

Offscreen textBaseline

10.4M/s

Canvas font

2.9M/s

Canvas

1.3M/s

Offscreen

470K/s

View exact numbers

Test name	Executions per second
✓ Offscreen font	12,103,269 Ops/sec
Canvas textAlign	11,419,141 Ops/sec
Offscreen textAlign	11,357,265 Ops/sec
Canvas textBaseline	10,678,636 Ops/sec
Offscreen textBaseline	10,395,728 Ops/sec
Canvas font	2,933,894 Ops/sec
Canvas	1,334,286 Ops/sec
Offscreen	470,442 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";