Run results for: Empty an array in JavaScript

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0

Browser: Firefox 115

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

var size = 100000;
var a = [];
for (var i = 0; i < size; i++){
  a.push(Math.random());
}

Tests:

Instantiate new array
var a1 = JSON.parse(JSON.stringify(a)); a1 = [];
Set length to zero
var a2 = JSON.parse(JSON.stringify(a)); a2.length = 0;
Splice at index zero
var a3 = JSON.parse(JSON.stringify(a)); a3.splice(0, a3.length);
Pop all values
var a4 = JSON.parse(JSON.stringify(a)); while(a4.length > 0){ a4.pop(); }