Run results for: array filter vs for + if

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

for + if

152/s

filter

106/s

View exact numbers

Test name	Executions per second
✓ for + if	152 Ops/sec
filter	106 Ops/sec

Script Preparation code:

const arraySize = 1_000_000;
const numbers = Array.from({length: arraySize}, () => Math.floor(Math.random() * 100_000));

Tests:

filter
const evenWithFilter = numbers.filter((num) => num % 2 === 0);
for + if
const evenWithLoop = []; for (let i = 0; i < numbers.length; i++) { if (numbers[i] % 2 === 0) { evenWithLoop.push(numbers[i]); } }