Run results for: Measure texts - OffscreenCanvas vs Canvas

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Canvas

2.3M/s

OffscreenCanvas

2.3M/s

View exact numbers

Test name	Executions per second
✓ Canvas	2,329,817 Ops/sec
OffscreenCanvas	2,305,396 Ops/sec

Script Preparation code:

var canvas = document.createElement('canvas');
var context = canvas.getContext('2d');
context.font = 'bold 48px serif';

var offscreenCanvas = new OffscreenCanvas(0, 0);
var offscreenContext = offscreenCanvas.getContext('2d');
offscreenContext.font = 'bold 48px serif';

Tests:

Canvas
context.measureText("TESTM").width
OffscreenCanvas
offscreenContext.measureText("TESTM").width