Run results for: empty an array in JavaScript?

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_0_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.0.3

Device Platform: Mobile

Date tested: 6 months ago

Test name	Executions per second
Just instantiate new array	33873.2 Ops/sec
Set length to zero	33611.0 Ops/sec
Splice	27523.1 Ops/sec
Pop all values	18918.5 Ops/sec

Tests:

Just instantiate new array
var size = 10000; var arr1 = []; for (var i = 0; i < size; i++){ arr1.push(i); } arr1 = [];
Set length to zero
var size = 10000; var arr2 = []; for (var i = 0; i < size; i++){ arr2.push(i); } arr2.length = 0;
Splice
var size = 10000; var arr3 = []; for (var i = 0; i < size; i++){ arr3.push(i); } arr3.splice(0, arr3.length);
Pop all values
var size = 10000; var arr4 = []; for (var i = 0; i < size; i++){ arr4.push(i); } while(arr4.length > 0){ arr4.pop(); }

Run results for: empty an array in JavaScript?

Based on question on http://stackoverflow.com/questions/1232040/how-do-i-empty-an-array-in-javascript

Just instantiate new array

Set length to zero

Splice

Pop all values