MeasureThat.net

Run results for: JavaScript spread operator vs Slice/Splice performance 2

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Run details:
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36
Chrome 95
Windows
Desktop
3 years ago
Test name Executions per second
Array clone with spread operator 14016600.0 Ops/sec
Array clone with slice 15119229.0 Ops/sec
Script Preparation code:
​x
 
const ITERATIONS = 500000;
var index = ITERATIONS/2;
var n = Math.random();
​
var list = [];
for (let i = 0; i < length; i += 1) {
  list.push(Math.random());
}
Tests:

  • Array clone with spread operator

     
    const clone = [...list];

  • Array clone with slice

     
    const clone = list.slice();