MeasureThat.net

Run results for: slice VS splice VS shift: who is the fastest to keep constant size (fork no string push)

100k list splice and shift win, they mutate list slice loose, it creates a copy of list 7.5x slower

Go to the benchmark
Run details:
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:132.0) Gecko/20100101 Firefox/132.0
Firefox 132
Ubuntu
Desktop
2 months ago
Test name Executions per second
slice 164.0 Ops/sec
splice 29070012.0 Ops/sec
shift 173746016.0 Ops/sec
Script Preparation code:
AخA
 
var list = [];
for (var i = 0; i < 1000 * 1000; i++) {
  list.push(i);
}
Tests:

  • slice

     
    list = list.slice(1);

  • splice

     
    list.splice(0, 1);

  • shift

     
    list.shift();