Run results for: Measure texts - OffscreenCanvas vs Canvas

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36

Browser: Chrome 144

Operating system: Windows

Device Platform: Desktop

Date tested: 6 months ago

OffscreenCanvas

1.3M/s

Canvas

1.2M/s

View exact numbers

Test name	Executions per second
✓ OffscreenCanvas	1,334,942 Ops/sec
Canvas	1,156,754 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