Run results for: Array length assertion

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser: Chrome 122

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
!!arr.length	11082.7 Ops/sec
arr.length > 0	10785.5 Ops/sec

Script Preparation code:

var arrArr = [[], [], [1,2,3],[], [], [1,2,3],[], [], [1,2,3],[], [], [1,2,3],[], [], [1,2,3],[], [], [1,2,3],[], [], [1,2,3],[], [], [1,2,3],[], [], [1,2,3],[], [], [1,2,3],[], [], [1,2,3],[], [], [1,2,3],[], [], [1,2,3],[], [], [1,2,3]];

Tests:

!!arr.length
for (arr in arrArr) { if (!!arr.length) console.log(1) else console.log(0) }
arr.length > 0
for (arr in arrArr) { if (arr.length > 0) console.log(1) else console.log(0) }

Run results for: Array length assertion

!!arr.length

arr.length > 0