Run results for: isArray vs length

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.4 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 16

Operating system: iOS 16.4.1

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Array.isArray	14452100.0 Ops/sec
Check object.length	14665853.0 Ops/sec

Script Preparation code:

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

Tests: