Run results for: isArray vs length

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser: Chrome 137

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Check object.length

185.8M/s

Array.isArray

171.6M/s

View exact numbers

Test name	Executions per second
✓ Check object.length	185,846,192 Ops/sec
Array.isArray	171,594,400 Ops/sec

Script Preparation code:

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

Tests: