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

Run details:

User agent: Mozilla/5.0 (Linux; Android 4.2.2; ME173X Build/JDQ39) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.94 Safari/537.36 OPR/37.0.2192.105088

Browser: Opera 37

Operating system: Android 4.2.2

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
slice	6.8 Ops/sec
splice	63.4 Ops/sec
shift	62.5 Ops/sec

Script Preparation code:

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(0, 1);
shift
list.push('splice'); list.shift();

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

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

slice

splice

shift