Run results for: Custom Event vs Callback with console log

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0

Browser: Firefox 121

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Custom Event	6.9 Ops/sec
Callback	260.9 Ops/sec

Tests:

Custom Event
let i = 1001; 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 = 1001; const results = []; while (--i) { cb(); }