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/117.0.0.0 Safari/537.36 Edg/117.0.2045.47

Browser: Chrome 117

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Canvas	1788353.0 Ops/sec
Offscreen	1763633.0 Ops/sec
Canvas font	5351457.0 Ops/sec
Offscreen font	16168450.0 Ops/sec
Canvas textBaseline	13814700.0 Ops/sec
Offscreen textBaseline	13220660.0 Ops/sec
Canvas textAlign	12960300.0 Ops/sec
Offscreen textAlign	13039080.0 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