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/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Array.isArray

234.5M/s

Check object.length

229.4M/s

View exact numbers

Test name	Executions per second
✓ Array.isArray	234,510,704 Ops/sec
Check object.length	229,434,800 Ops/sec

Script Preparation code:

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

Tests: