Run results for: for-in vs object.keys [2]

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser: Chrome 109

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
for-in	1.7 Ops/sec
Object.keys	1.6 Ops/sec

Script Preparation code:

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

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

Tests:

for-in

for (let i=10000; i > 0; i--) {
  for (let key in obj) {
      console.log(obj[key]); 
  }
}

 
for (let i=10000; i > 0; i--) {  for (let key in obj) {      console.log(obj[key]);   }}

Object.keys

for (let i=10000; i > 0; i--) {
  const keys = Object.keys(obj);
  for (let i = 0, iMax = keys.length, key; i < iMax; ++i) {
    console.log(obj[keys[i]])
  }
}

 
for (let i=10000; i > 0; i--) {  const keys = Object.keys(obj);  for (let i = 0, iMax = keys.length, key; i < iMax; ++i) {    console.log(obj[keys[i]])  }}