MeasureThat.net

Run results for: Array filter vs. for loop - with for in

Go to the benchmark
Run details:
Mozilla/5.0 (X11; Linux x86_64; rv:136.0) Gecko/20100101 Firefox/136.0
Firefox 136
Linux
Desktop
one month ago
Test name Executions per second
Filter 7379038.0 Ops/sec
For 2872223.8 Ops/sec
For 2 1799583.1 Ops/sec
For in 706049.6 Ops/sec
Script Preparation code:
AخA
 
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]);
    }