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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36

Browser: Chrome 96

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
slice	2717218.0 Ops/sec
splice	3698873.5 Ops/sec
shift	5578233.5 Ops/sec

Script Preparation code:

var list = [];
for (var i = 0; i < 10000; i++) {
  let object = {};
  for (var j = 0; j < 300; j++)
  {
    object[j] = 0.01
  }
  list.push(object);
}

Tests:

slice
list.push('slice'); list = list.slice(10);
splice
list.push('splice'); list.splice(0, 10);
shift
list.push('splice'); list.shift();

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

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

slice

splice

shift