Run results for: Object.hasOwnProperty vs in

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Object.hasOwnProperty	10738.8 Ops/sec
in	21525.1 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

var arr = Array(10_000).fill(undefined).map((_, index) => index + 1);
var obj = Object.fromEntries(arr.map((v) => [v, v]));

Tests: