Benchmark: for-in vs object.keys vs object.values vs arr

Script Preparation code:

var obj = {
  'a': {
    id: 'a',
    num: 1
  },
  'b': {
    id: 'b',
    num: 1
  },
  'c': {
    id: 'c',
    num: 1
  },
  'd': {
    id: 'd',
    num: 1
  },
  'e': {
    id: 'e',
    num: 1
  },
  'f': {
    id: 'f',
    num: 1
  },
  'g': {
    id: 'g',
    num: 1
  },
};

var arr = [
  {
    id: 'a',
    num: 1
  },
  {
    id: 'b',
    num: 1
  },
  {
    id: 'c',
    num: 1
  },
  {
    id: 'd',
    num: 1
  },
  {
    id: 'e',
    num: 1
  },
  {
    id: 'f',
    num: 1
  },
  {
    id: 'g',
    num: 1
  }
];

Tests:

for-in
for (var i=10000; i > 0; i--) { for (var key in obj) { console.log(obj[key].id); } }
Object.keys
for (var i=10000; i > 0; i--) { Object.keys(obj).forEach(key => console.log(obj[key].id)); }
Object.values
for (var i=10000; i > 0; i--) { const values = Object.values(obj); for (var j=0,l=values.length; j < l; j++) { console.log(values[j].id); } }
Array for
for (var i=10000; i > 0; i--) { for (var j=0,l=arr.length; j < l; j++) { console.log(arr[j].id); } }
Array forEach
for (var i=10000; i > 0; i--) { arr.forEach(n => console.log(n.id)); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for-in
Object.keys
Object.values
Array for
Array forEach

Fastest: N/A

Slowest: N/A

Latest run results:

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Related benchmarks:

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

Comparing performance of: for-in vs Object.keys vs Object.values vs Array for vs Array forEach

Created: 2 years ago by: Guest

Jump to the latest result

for-in

Object.keys

Object.values

Array for

Array forEach

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results