Run results for: in vs hasOwnProperty

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:78.0) Gecko/20100101 Firefox/78.0

Browser: Firefox 78

Operating system: Mac OS X 10.11

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
in	24487320.0 Ops/sec
property	9878447.0 Ops/sec

Script Preparation code:

var obj = { a: 5, b: 6, c: 7 };

AخA
 
var obj = { a: 5, b: 6, c: 7 };

Tests:

in
'a' in obj; 'b' in obj; 'c' in obj;
'a' in obj;
'b' in obj;
'c' in obj;
property
Object.hasOwnProperty.call(obj, 'a'); Object.hasOwnProperty.call(obj, 'b'); Object.hasOwnProperty.call(obj, 'c');
Object.hasOwnProperty.call(obj, 'a');
Object.hasOwnProperty.call(obj, 'b');
Object.hasOwnProperty.call(obj, 'c');