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 10; SM-G965U Build/QP1A.190711.020) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.81 Mobile Safari/537.36 OPT/2.6

Browser: Chrome Mobile 85

Operating system: Android

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
slice	6.9 Ops/sec
splice	7.9 Ops/sec
shift	1662.3 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