Run results for: callback vs event

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

callback

589K/s

event

1K/s

View exact numbers

Test name	Executions per second
✓ callback	588,675 Ops/sec
event	1,176 Ops/sec

Tests:

event
const results = []; function cb() { results[0] = 1; } let i = 1001; eventTarget = new EventTarget(); eventTarget.addEventListener('customtype', cb); while (--i) { eventTarget.dispatchEvent(new Event('customtype')); }
callback
const results = []; function cb() { results[0] = 1; } let i = 1001; while (--i) { cb(); }