Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 13_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/80.0.3987.95 Mobile/15E148 Safari/604.1
Chrome Mobile iOS 80
iOS 13.3
Mobile
5 years ago
Test name Executions per second
arrayUnshift123 4939510.5 Ops/sec
arrayConcat123 5.7 Ops/sec
arraySpread123 4.5 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]