Run results for: isArray vs length

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Array.isArray

19.5M/s

Check object.length

13.8M/s

View exact numbers

Test name	Executions per second
✓ Array.isArray	19,526,678 Ops/sec
Check object.length	13,759,530 Ops/sec

Script Preparation code:

function myIsArray(obj){
  return obj.length > 0;
}

var isArray = Array.isArray

Tests: