Run results for: JS Array Clearing3

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36

Browser: Chrome 94

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Length = 0	8493657.0 Ops/sec
Splice	6207184.0 Ops/sec
Shift	6867429.0 Ops/sec
Pop	7552077.0 Ops/sec

Script Preparation code:

var a = [];
for (var i=0; i < 10000000;i++){
  a.push("item"+i + Math.random());
}

function remove(arr) {
  while(arr.length) {
    arr.shift(); 
  }
}



function remove2(arr) {
  while(arr.length) {
    arr.pop(); 
  }
}

Tests:

Length = 0
a.length = 0;
Splice
a.splice(0, a.length-1);
Shift
remove(a);
Pop
remove2(a);
array = []
a = [];

Run results for: JS Array Clearing3

Length = 0

Splice

Shift

Pop

array = []