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Run results for: concat vs unshift vs spread

spread vs concat vs unshift

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Run details:
Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.119 Safari/537.36
Chrome 72
Windows 8.1
Desktop
5 years ago
Test name Executions per second
arrayUnshift123 18983.7 Ops/sec
arrayConcat123 521.5 Ops/sec
spread 142.0 Ops/sec
Script Preparation code:
AخA
 
var array = [1,2,3];
Tests:

  • arrayUnshift123

     
    array.unshift(0);

  • arrayConcat123

     
    array = [0].concat(array)

  • spread

     
    array = [0,...array]