Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36
Chrome 99
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
arrayUnshift123 21370.7 Ops/sec
arrayConcat123 266.2 Ops/sec
arraySpread123 124.8 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]