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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; rv:148.0) Gecko/20100101 Firefox/148.0
Browser:
Firefox 148
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
4 months ago
for
1.3M/s
foreach
150K/s
reduce
106K/s
map
94K/s
filter
85K/s
View exact numbers
Test name
Executions per second
✓
for
1,252,382 Ops/sec
foreach
150,044 Ops/sec
reduce
105,743 Ops/sec
map
94,244 Ops/sec
filter
85,346 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))