MeasureThat.net

Run results for: (fair) Array slice vs for loop with direct attribution

slice is just better

Go to the benchmark
Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Chrome 108
Windows
Desktop
2 years ago
Test name Executions per second
Array Slice 11834385.0 Ops/sec
Direct Attribution 2491644.8 Ops/sec
Script Preparation code:
AخA
 
var data = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0];
Tests:

  • Array Slice

     
    var copy = data.slice(0, 4);

  • Direct Attribution

     
    var copy = [];
    for (var i = 0; i < 5; i++) {
      copy = [];
      copy[i] = data[i];
    }