Run results for: Custom Event vs Callback

Run details:

User agent: Mozilla/5.0 (Android 11; Mobile; rv:101.0) Gecko/101.0 Firefox/101.0

Browser: Firefox Mobile 101

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Custom Event	303.2 Ops/sec
Callback	48.1 Ops/sec

Tests:

Custom Event
let i = 1001; const results = []; while (--i) { window.dispatchEvent(new CustomEvent('custom:test')); }
Callback
function cb() { console.log('hi') } let i = 1001; const results = []; while (--i) { cb(); }