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/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Offscreen font

7.4M/s

Canvas textAlign

6.8M/s

Canvas textBaseline

6.8M/s

Offscreen textAlign

6.6M/s

Offscreen textBaseline

6.3M/s

Canvas font

2.6M/s

Canvas

1.1M/s

Offscreen

217K/s

View exact numbers

Test name	Executions per second
✓ Offscreen font	7,364,313 Ops/sec
Canvas textAlign	6,835,914 Ops/sec
Canvas textBaseline	6,812,960 Ops/sec
Offscreen textAlign	6,563,175 Ops/sec
Offscreen textBaseline	6,317,236 Ops/sec
Canvas font	2,602,355 Ops/sec
Canvas	1,143,448 Ops/sec
Offscreen	217,078 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";