Array concat vs spread operator vs push (es6)

Compare the new ES6 spread operator with the traditional concat() method and push
3 years ago
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Test name Executions per second
Array.prototype.concat 6210312.0 Ops/sec
spread operator 35629736.0 Ops/sec
Push 73683112.0 Ops/sec
Tests:

  • Array.prototype.concat

    AخA
     
    let arr = [1];
    arr = arr.concat([2]);

  • spread operator

     
    let arr = [1];
    arr = [...arr, 2];

  • Push

     
    let arr = [1];
    arr.push(2);
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