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) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser: Chrome 145

Operating system: Windows

Device Platform: Desktop

Date tested: 5 months ago

Splice

30.5M/s

Set length to zero

23.0M/s

View exact numbers

Test name	Executions per second
✓ Splice	30,456,768 Ops/sec
Set length to zero	23,012,442 Ops/sec

Script Preparation code:

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

Tests: