Run results for: setFont measureText OffscreenCanvas vs Canvas

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0

Browser: Firefox 109

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Canvas	1201521.0 Ops/sec
Offscreen	1275007.0 Ops/sec
Canvas font	167248.4 Ops/sec
Offscreen font	637185.8 Ops/sec
Canvas textBaseline	44623610.0 Ops/sec
Offscreen textBaseline	45247230.0 Ops/sec
Canvas textAlign	40538500.0 Ops/sec
Offscreen textAlign	39457140.0 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";

Run results for: setFont measureText OffscreenCanvas vs Canvas

DomCanvas vs OffscreenCanvas

Canvas

Offscreen

Canvas font

Offscreen font

Canvas textBaseline

Offscreen textBaseline

Canvas textAlign

Offscreen textAlign