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/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Offscreen font

15.8M/s

Canvas textAlign

13.7M/s

Offscreen textBaseline

13.4M/s

Canvas textBaseline

13.4M/s

Offscreen textAlign

12.7M/s

Canvas font

6.7M/s

Canvas

2.3M/s

Offscreen

414K/s

View exact numbers

Test name	Executions per second
✓ Offscreen font	15,818,722 Ops/sec
Canvas textAlign	13,676,694 Ops/sec
Offscreen textBaseline	13,430,466 Ops/sec
Canvas textBaseline	13,388,220 Ops/sec
Offscreen textAlign	12,744,398 Ops/sec
Canvas font	6,734,483 Ops/sec
Canvas	2,349,423 Ops/sec
Offscreen	414,221 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";