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Run results for:
hasOwnProperty vs direct access (bool) vs in 2
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<iframe src="https://measurethat.net/Embed?id=605108" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36
Browser:
Chrome 135
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
hasOwnProperty
97512392.0 Ops/sec
direct access (bool)
204143856.0 Ops/sec
in
201358592.0 Ops/sec
object
82969592.0 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
object
Object.prototype.hasOwnProperty.call(x, 'a')