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Run results for:
hasOwnProperty vs direct access (bool) vs in 2
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36
Browser:
Chrome 122
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
hasOwnProperty
25784922.0 Ops/sec
direct access (bool)
31660844.0 Ops/sec
in
31732660.0 Ops/sec
object
10225923.0 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')