Script Preparation code:
AخA
 
var arr = Array.from({length: 100000}).map((_, i) => ({i}));
Tests:
  • unshift

     
    var arr2 = [];
    for (let i = 0; i < arr.length; i++){
      arr2.unshift({...arr[i]});
    }
  • reverse

     
    var arr3 = arr.map(o=>({...o})).reverse();
Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

  • Test case name Result
    unshift
    reverse

    Fastest: N/A

    Slowest: N/A

Latest run results:
Run details: (Test run date: one month ago)
Mozilla/5.0 (iPhone; CPU iPhone OS 18_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.2 Mobile/15E148 Safari/604.1
Mobile Safari 18 on iOS 18.2.1
View result in a separate tab
Test name Executions per second
unshift 0.4 Ops/sec
reverse 260.0 Ops/sec