Benchmark: isArray vs optional length

Script Preparation code:

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

Tests:

Rendered benchmark preparation results:

Previous results

Test case name	Result
Array.isArray
Check object.length

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Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser/OS: Chrome 116 on Windows

Test name	Executions per second
Array.isArray	16803140.0 Ops/sec
Check object.length	19872280.0 Ops/sec

isArray vs optional length (version: 0)