Run results for: Compare !array.length vs array.length === 0

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.3.1 Safari/605.1.15

Browser: Safari 17

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

arr.length === 0

1.5M/s

!array.length

1.5M/s

View exact numbers

Test name	Executions per second
✓ arr.length === 0	1,540,176 Ops/sec
!array.length	1,518,081 Ops/sec

Script Preparation code:

var arr = [];

Tests:

!array.length
if (!arr.length) { console.log(1); } else { console.log(0); }
arr.length === 0
if (arr.length === 0) { console.log(1); } else { console.log(0); }