Run results for: for-in with hasOwnProperty vs for-of over Object.keys

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:100.0) Gecko/20100101 Firefox/100.0

Browser: Firefox 100

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
for-in with hasOwnProperty	27644.9 Ops/sec
Object.keys	26402.8 Ops/sec

Script Preparation code:

var obj = {
  'a': 1,
  'b': 1,
  'c': 1,
  'd': 1,
  'e': 1,
  'f': 1,
  'g': 1
};

Tests:

for-in with hasOwnProperty
var hasOwn = Object.prototype.hasOwnProperty; for (var key in obj) { if (hasOwn.call(obj, key)) { console.log(key); } }
Object.keys
for (var key of Object.keys(obj)) { console.log(key); }