MeasureThat.net

Run results for: Array.prototype.concat vs spread operator

Compare the new ES6 spread operator with the traditional concat() method

Go to the benchmark
Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Chrome 130
Mac OS X 10.15.7
Desktop
5 months ago
Test name Executions per second
slice 15967863.0 Ops/sec
spread operator 15219452.0 Ops/sec
concat into empty array 14990695.0 Ops/sec
Script Preparation code:
AخA
 
var myArray = [ "hello", true, 7 ]
Tests:

  • slice

     
    var other = myArray.slice();

  • spread operator

     
    var other = [ ...myArray ]

  • concat into empty array

     
    [].concat(myArray);