Run results for: Test if array is empty

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.1.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.1.1

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
!arr.length	16860502.0 Ops/sec
arr.length === 0	16718280.0 Ops/sec

Script Preparation code:

var arr = [];
var status;

Tests:

!arr.length
status = !arr;
arr.length === 0
status = arr.length === 0;

Run results for: Test if array is empty

!arr.length

arr.length === 0