Run results for: isArray vs length

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:123.0) Gecko/20100101 Firefox/123.0

Browser: Firefox 123

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Check object.length

1494.1M/s

Array.isArray

711.2M/s

View exact numbers

Test name	Executions per second
✓ Check object.length	1,494,075,648 Ops/sec
Array.isArray	711,173,824 Ops/sec

Script Preparation code:

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

Tests: