Run results for: array every vs some vs for loop fork

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_4_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 14

Operating system: iOS 14.4.2

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
every	4879994.0 Ops/sec
for of loop	1987880.0 Ops/sec
for loop	4922752.0 Ops/sec
reduce	1600999.0 Ops/sec
reduce 2	6418926.0 Ops/sec

Tests:

every
const a = [1, 2, 3, 4, 5]; const b = [1, 2, 4, 5, 3, 5]; a.every(x => b.some(y => x === y));
for of loop
const a = [1, 2, 3, 4, 5]; const b = [1, 2, 4, 5, 3, 5]; for (let x of a) { if (!b.some(y => x === y)) { break; } }
for loop
const a = [1, 2, 3, 4, 5]; const b = [1, 2, 4, 5, 3, 5]; for (let i = 0; i < a.length; i++) { if (!b.some(y => a[i] === y)) { break; } }
reduce
const a = [1, 2, 3, 4, 5]; const b = [1, 2, 4, 5, 3, 5]; a.reduce((x, y, i) => i === 0 ? b.some(p => p === x) : b.some(p => p === y))
reduce 2
const a = [1, 2, 3, 4, 5]; const b = [1, 2, 4, 5, 3, 5]; a.reduce(function (x, y, i) { return i === 0 ? b.some(p => p === x) : b.some(p => p === y) })

Run results for: array every vs some vs for loop fork

every

for of loop

for loop

reduce

reduce 2