Run results for: for-in vs object.keys map array 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser: Chrome 103

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
for-in	186.5 Ops/sec
Object.keys	148.1 Ops/sec

Script Preparation code:

var obj = {
    '1': 1,
    '2': 1,
    '3': 1,
    '4': 1,
    '5': 1,
    '6': 1,
    '7': 1,
    '8': 1,
    '9': 1,
    '10': 1
};

Tests:

for-in
for (var i=10000; i > 0; i--) { const arr = []; for (var key in obj) { arr.push(+key); } }
Object.keys
for (var i=10000; i > 0; i--) { Object.keys(obj).map(key => +key); }