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Run results for: slice VS splice VS shift: who is the fastest to keep constant size [VARIANT]

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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36
Chrome 119
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
slice 383.9 Ops/sec
splice 9019286.0 Ops/sec
Script Preparation code:
AخA
 
var list = [];
for (var i = 0; i < 1000 * 1000; i++) {
  list.push(i);
}
Tests:

  • slice

     
    list.push('slice');
    list = list.slice(1);

  • splice

     
    list.push('splice');
    list.splice(1, list.length-1);