Benchmark: for-in vs object.keys Test

Script Preparation code:

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

Tests:

for-in
array = []; for (var key in obj) { array.push(key); } console.log("Done: ", array);
Object.keys
Object.keys(obj); console.log("Done: ", array);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for-in
Object.keys

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 13_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.1 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 13 on iOS 13.1.2

View result in a separate tab

Test name	Executions per second
for-in	202946.3 Ops/sec
Object.keys	341000.8 Ops/sec

for-in vs object.keys Test (version: 0)

Comparing performance of: for-in vs Object.keys

Created: 4 years ago by: Guest

Jump to the latest result

for-in

Object.keys

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A