Run results for: isArray vs length

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:143.0) Gecko/20100101 Firefox/143.0

Browser: Firefox 143

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 9 months ago

Check object.length

1572.8M/s

Array.isArray

333.2M/s

View exact numbers

Test name	Executions per second
✓ Check object.length	1,572,799,616 Ops/sec
Array.isArray	333,232,032 Ops/sec

Script Preparation code:

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

Tests: