Run results for: Custom Event vs Callback 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Browser: Chrome 108

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Custom Event	4.1 Ops/sec
Callback	61384.8 Ops/sec

Tests:

Custom Event
let i = 1001; const results = []; window.addEventListener('custom:test', (evt) => { results.push(`Custom Event ${evt.detail.idx}`); }); while (--i) { window.dispatchEvent(new CustomEvent('custom:test', { detail: { idx: i } })); }
Callback
const results = []; function cb(i) { results.push(`Callback ${i}`); } let i = 1001; while (--i) { cb(i); }