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Run results for:
Array filter vs. for loop - with for in
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<iframe src="https://measurethat.net/Embed?id=591087" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0
Browser:
Firefox 136
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Filter
8.6M/s
For
2.3M/s
For 2
2.1M/s
For in
626K/s
View exact numbers
Test name
Executions per second
✓
Filter
8,568,054 Ops/sec
For
2,265,268 Ops/sec
For 2
2,089,244 Ops/sec
For in
626,398 Ops/sec
Script Preparation code:
var arr = [1,2,3,4,5,6,7,8,9,0], farr;
Tests:
Filter
farr = arr.filter(function(item) { return (item>4); });
For
for (var i=0,len=arr.length;i<len;i++) { if (arr[i]<5) continue; farr.push(arr[i]); }
For 2
for (var i=0,len=arr.length;i<len;i++) { if (arr[i]>4) farr.push(arr[i]); }
For in
for (var i in arr) { if (arr[i]>4) farr.push(arr[i]); }