Run results for: for-in vs object.keys vs object.values for objects - output object values

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Object.values

23/s

for-in

22/s

Object.keys

22/s

View exact numbers

Test name	Executions per second
✓ Object.values	23 Ops/sec
for-in	22 Ops/sec
Object.keys	22 Ops/sec

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
  },
};

Tests:

for-in
for (var i=10000; i > 0; i--) { var output = [] for (var key in obj) { output.push(obj[key]); } console.log(output) }
Object.keys
for (var i=10000; i > 0; i--) { var output = Object.keys(obj).map(key => obj[key]); console.log(output) }
Object.values
for (var i=10000; i > 0; i--) { var output = Object.values(obj); console.log(output) }