Run results for: some vs for..of (with condition)

Run details:

User agent: Mozilla/5.0 (iPad; CPU OS 14_8 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/96.0.4664.53 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 96

Operating system: iOS 14.8

Device Platform: Tablet

Date tested: 2 years ago

Test name	Executions per second
some largeArray	469413.9 Ops/sec
For...of largeArray	322780.3 Ops/sec
some smallArray	7692460.5 Ops/sec
for...of smallArray	9950929.0 Ops/sec

Script Preparation code:

var largeArray = [];
for (let i = 0; i < 10000; i++) {
    // prevent clever optimizations for addition
    // binary value 1001
    largeArray.push(i * 9);
}
var smallArray = [];
for (let i = 0; i < 100; i++) {
    // prevent clever optimizations for addition
    // binary value 1001
    smallArray.push(i * 9);
}

Tests:

some largeArray
let result = 0; largeArray.some((i) => { if (i % 7 === 0) { result += i; return false; } if (i === 9999) { result += i; return true; } return false; });
For...of largeArray
let result = 0; for (const i of largeArray) { if (i % 7 === 0) { result += i; continue; } if (i === 9999) { result += i; break; } }
some smallArray
let result = 0; smallArray.some((i) => { if (i % 7 === 0) { result += i; return false; } if (i === 99) { result += i; return true; } return false; });
for...of smallArray
let result = 0; for (const i of smallArray) { if (i % 7 === 0) { result += i; continue; } if (i === 99) { result += i; break; } }

Run results for: some vs for..of (with condition)

some vs for...of

some largeArray

For...of largeArray

some smallArray

for...of smallArray