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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36

Browser: Chrome 150

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 22 days ago

Splice

65.6M/s

Set length to zero

45.4M/s

View exact numbers

Test name	Executions per second
✓ Splice	65,586,884 Ops/sec
Set length to zero	45,360,248 Ops/sec

Script Preparation code:

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

Tests: