Run results for: Custom Event vs Callback

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Custom Event

2K/s

Callback

203/s

View exact numbers

Test name	Executions per second
✓ Custom Event	2,444 Ops/sec
Callback	203 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(); }