Run results for: isArray vs length

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:140.0) Gecko/20100101 Firefox/140.0

Browser: Firefox 140

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 10 months ago

Test name	Executions per second
Array.isArray	324152896.0 Ops/sec
Check object.length	1567891584.0 Ops/sec

Script Preparation code:

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

Tests: