Run results for: empty an array in JavaScript - splice vs setting length faster

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Goanna/6.8 Firefox/128.0 PaleMoon/33.9.1

Browser: Pale Moon (Firefox Variant) 33

Operating system: Windows

Device Platform: Desktop

Date tested: 7 months ago

Set length to zero

46.3M/s

Splice

4.1M/s

View exact numbers

Test name	Executions per second
✓ Set length to zero	46,338,732 Ops/sec
Splice	4,107,822 Ops/sec

Script Preparation code:

var size = 10000;
var arr = [];
for (var i = 0; i < size; i++){
  arr.push(i);
}

Tests: