MeasureThat.net

Run results for: arr unshift vs push + reverse (large array)

Go to the benchmark
Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:101.0) Gecko/20100101 Firefox/101.0
Firefox 101
Windows
Desktop
2 years ago
Test name Executions per second
unshift 4.8 Ops/sec
push + reverse 27.6 Ops/sec
Script Preparation code:
AخA
 
var arr = [];
Tests:

  • unshift

     
    for (let i = 0; i < 100000; i++){
      arr.unshift(i);
    }

  • push + reverse

     
    for (let i = 0; i < 100000; i++){
      arr.push(i);
    }
    arr.reverse();