Benchmark: for-in vs object.keysasdasdasd

Script Preparation code:

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

Tests:

for-in
for (var i=10000; i > 0; i--) { for (var key in obj) { console.log(key); } }
Object.keys
for (var i=10000; i > 0; i--) { for (const key of Object.keys(obj)){ console.log(key); } }

Rendered benchmark preparation results:

Previous results

Test case name	Result
for-in
Object.keys

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36

Browser/OS: Chrome 67 on Windows 7

Test name	Executions per second
for-in	0.4 Ops/sec
Object.keys	0.4 Ops/sec

for-in vs object.keysasdasdasd (version: 0)