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Run results for: Array.prototype.concat vs spread operator - large arrays

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

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36
Chrome 102
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
Array.prototype.concat 576.4 Ops/sec
spread operator 565.4 Ops/sec
Tests:

  • Array.prototype.concat

    AخA
     
    var list1 = [];
    var list2 = [];
    for(var i = 0; i<10000; i++) {list1.push(Math.random());list2.push(Math.random());}
    var result = list1.concat(list2);

  • spread operator

     
    var list1 = [];
    var list2 = [];
    for(var i = 0; i<10000; i++) {list1.push(Math.random());list2.push(Math.random());}
    var other = [ ...list1, ...list2 ]