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Run results for:
Array loop vs foreach vs map vs filter vs reduce
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Browser:
Chrome 130
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
foreach
35K/s
reduce
35K/s
map
33K/s
filter
32K/s
for
18K/s
View exact numbers
Test name
Executions per second
✓
foreach
35,315 Ops/sec
reduce
34,584 Ops/sec
map
32,604 Ops/sec
filter
32,271 Ops/sec
for
17,518 Ops/sec
Script Preparation code:
var arr = []; for (var i = 0; i < 1000; i++) { arr[i] = i; } function someFn(i) { return i * 3 * 8; }
Tests:
foreach
arr.forEach(function (item){ someFn(item); })
for
for (var i = 0, len = arr.length; i < len; i++) { someFn(arr[i]); }
map
arr.map(item => someFn(item))
filter
arr.filter(item => someFn(item))
reduce
arr.reduce(item => someFn(item))