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Run results for: spread vs concat vs unshift

spread vs concat vs unshift

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36
Chrome 74
Mac OS X 10.14.3
Desktop
5 years ago
Test name Executions per second
arrayUnshift123 20366.0 Ops/sec
arrayConcat123 584.1 Ops/sec
arraySpread123 131.0 Ops/sec
Script Preparation code:
AخA
 
var array = [1,2,3];
Tests:

  • arrayUnshift123

     
    array.unshift(0);

  • arrayConcat123

     
    array = array.concat([0])

  • arraySpread123

     
    array = [0, ...array]