MeasureThat.net

Run results for: Copy Array

Speed of array cloning

Go to the benchmark
Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36 OPR/39.0.2256.71
Opera 39
Mac OS X 10.11.4
Other
8 years ago
Test name Executions per second
Spread 6.1 Ops/sec
Slice 180.0 Ops/sec
Slice(0) 177.0 Ops/sec
concat 185.0 Ops/sec
Script Preparation code:
AخA
 
var len = 1000*1000;
var arr = new Array(len);
Tests:

  • Spread

     
    var arr2 = [...arr];

  • Slice

     
    var arr2 = arr.slice();

  • Slice(0)

     
    var arr2 = arr.slice(0);

  • concat

     
    var arr2 = arr.concat();