Benchmark: Object.keys(object).includes(key) vs key in object

Script Preparation code:

var obj = (new Array(1000)).fill(null).reduce((prev, newVal) => {prev[Math.random() + ''] = Math.random() + ''; return prev; }, { sausage: 'tst' });

Tests:

Rendered benchmark preparation results:

Previous results

Test case name	Result
Object.keys(object).includes(key)
key in object

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Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.60 Safari/537.36

Browser/OS: Chrome 100 on Mac OS X 10.15.7

Test name	Executions per second
Object.keys(object).includes(key)	18807.0 Ops/sec
key in object	14025400.0 Ops/sec

Object.keys(object).includes(key) vs key in object (version: 0)