Run results for: for loop filter vs native array.filter

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Array.prototype.filter	2242.9 Ops/sec
for loop filter	15007.3 Ops/sec

Script Preparation code:

var array = [...Array(100000).keys()];

function fastFilter(arrayToFilter, cb) {
    const stack = []

    for (let i = 0; i < arrayToFilter.length; i += 1) {
        const item = arrayToFilter[i]

        if (cb(item, i)) {
            stack.push(item)
        }

    }

    return stack
}

Tests:

Array.prototype.filter
array.filter(n => n === 99999)
for loop filter
fastFilter(array, n => n === 99999)

Run results for: for loop filter vs native array.filter

Array.prototype.filter

for loop filter