MeasureThat.net

Run results for: Every Third Element

Go to the benchmark
Run details:
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36
Chrome 52
Windows 7
Other
8 years ago
Test name Executions per second
Push to new array 13950.0 Ops/sec
Splice 1746399.4 Ops/sec
Filter 1909140.2 Ops/sec
Script Preparation code:
​x
 
function fillArrayWithNumbers(n) {
        var arr = Array.apply(null, Array(n));
        return arr.map(function (x, i) { return i });
    }
​
var sourceArray = fillArrayWithNumbers(1000);
Tests:

  • Push to new array

     
    var targetArray = [];
    for (var i = 0; i < sourceArray.length; i = i+3) {
        targetArray.push(sourceArray[i]);
    };

  • Splice

     
    for(var i = 0; i < sourceArray.length; i++) {
        sourceArray.splice(i+1,2);
    }

  • Filter

     
    var targetArray = sourceArray.filter(function(_, i) { return (i % 3 == 0); })