MeasureThat.net

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

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:123.0) Gecko/20100101 Firefox/123.0
Firefox 123
Windows
Desktop
one year ago
Test name Executions per second
unshift 5.5 Ops/sec
push + reverse 30.9 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();