Run results for: Includes VS new Set

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2.1 Safari/605.1.15

Browser: Safari 17

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
✓ Includes	5 Ops/sec
new Set	4 Ops/sec

Tests:

Includes
const arr1 = Array.from({ length: 1_000_000 }, () => Math.floor(Math.random() * 100_000), ) const arr2 = Array.from({ length: 1_000_000 }, () => Math.floor(Math.random() * 100_000), ) const fn = () => { for (const el of arr1) { if (arr2.includes(el)) return true } } fn()
new Set
const arr1 = Array.from({ length: 1_000_000 }, () => Math.floor(Math.random() * 100_000), ) const arr2 = Array.from({ length: 1_000_000 }, () => Math.floor(Math.random() * 100_000), ) const fn = () => { const set = new Set(arr1) for (const el of arr2) { if (set.has(el)) return true } } fn()