Run results for: setFont measureText OffscreenCanvas vs Canvas

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0

Browser: Firefox 121

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Canvas textBaseline

57.2M/s

Offscreen textBaseline

55.2M/s

Canvas textAlign

54.4M/s

Offscreen textAlign

53.1M/s

Canvas font

3.9M/s

Offscreen

1.6M/s

Canvas

1.5M/s

Offscreen font

389K/s

View exact numbers

Test name	Executions per second
✓ Canvas textBaseline	57,188,020 Ops/sec
Offscreen textBaseline	55,230,900 Ops/sec
Canvas textAlign	54,433,180 Ops/sec
Offscreen textAlign	53,056,672 Ops/sec
Canvas font	3,876,138 Ops/sec
Offscreen	1,599,572 Ops/sec
Canvas	1,462,051 Ops/sec
Offscreen font	388,895 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";