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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.55 Safari/537.36

Browser: Chrome 96

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
some largeArray	657317.4 Ops/sec
For...of largeArray	593655.6 Ops/sec
some smallArray	15328710.0 Ops/sec
for...of smallArray	17031918.0 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