Run results for: hasOwnProperty vs direct access (bool) vs in

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/103.0.5060.63 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 103

Operating system: iOS 15.5

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
hasOwnProperty	24169508.0 Ops/sec
direct access (bool)	23330704.0 Ops/sec
in	23927114.0 Ops/sec

Script Preparation code:

var x = { a: 1, b: 2, c: 3, d: 4, e: 5, f: 6, g: 7, h: 8, i: 9}

Tests:

hasOwnProperty
x.hasOwnProperty("a")
direct access (bool)
x["a"]
in
"a" in x