Run results for: Custom Event vs Callback speed test 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36 Edg/136.0.0.0

Browser: Chrome 136

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Callback

236/s

Custom Event

5/s

View exact numbers

Test name	Executions per second
✓ Callback	236 Ops/sec
Custom Event	5 Ops/sec

Tests:

Custom Event
let i = 1001; function cb() { console.log('hi') } window.addEventListener('custom:test', cb); while (--i) { window.dispatchEvent(new Event('custom:test')); };
Callback
function cb() { console.log('hi') } let i = 1001; while (--i) { cb(); }