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Run results for: Array.prototype.slice vs spread operator - Large Arrays

Compare the new ES6 spread operator with the traditional slice() method on larger arrays

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36
Chrome 118
Windows
Desktop
one year ago
Test name Executions per second
Array.prototype.slice - 10k Numbers 820037.3 Ops/sec
spread operator - 10k Numbers 836665.7 Ops/sec
Array.prototype.slice - 10k Strings 849478.9 Ops/sec
spread operator - 10k Strings 844731.2 Ops/sec
Script Preparation code:
AخA
 
numArray = [];
stringArray = [];
for (let a = 0; a < 10000; a ++) {
  numArray.push(a);
  stringArray.push("Hello World");
}
Tests:

  • Array.prototype.slice - 10k Numbers

     
    var params = numArray;
    var other = params.slice();

  • spread operator - 10k Numbers

     
    var params = numArray;
    var other = [ ...params ];

  • Array.prototype.slice - 10k Strings

     
    var params = stringArray;
    var other = params.slice();

  • spread operator - 10k Strings

     
    var params = stringArray;
    var other = [ ...params ];