Run results for: Custom Event vs Callback with console log large

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Callback

83/s

Custom Event

4/s

View exact numbers

Test name	Executions per second
✓ Callback	83 Ops/sec
Custom Event	4 Ops/sec

Tests:

Custom Event
let i = 10001; const results = []; while (--i) { window.dispatchEvent(new CustomEvent('custom:test')); } window.addEventListener('custom:test', () => console.log('hi'))
Callback
function cb() { console.log('hi') } let i = 10001; const results = []; while (--i) { cb(); }