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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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Safari/537.36
Chrome 66
Windows
Other
6 years ago
Test name Executions per second
Array.prototype.concat 1150954.2 Ops/sec
spread operator 43641.3 Ops/sec
Script Preparation code:
AخA
 
var array1 = Array(400).fill().map(() => Math.round(Math.random() * 40));
var array2 = Array(400).fill().map(() => Math.round(Math.random() * 40));
Tests:

  • Array.prototype.concat

     
    var others = array1.concat(array2);

  • spread operator

     
    var others = [...array1, ...array2];