Benchmark: Check variable vs check if key is in object

Script Preparation code:

var obj = {
  _items: [],
  _test: "abc",
  _var1: 100,
  _var2: 200,
  _type: 1
}

Tests:

Rendered benchmark preparation results:

Previous results

Test case name	Result
Check variable
Check if object has a key

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser/OS: Chrome 111 on Windows

Test name	Executions per second
Check variable	11561220.0 Ops/sec
Check if object has a key	11490190.0 Ops/sec

Check variable vs check if key is in object (version: 0)