Run results for: Loop over object: lodash vs Object.entries fork by d9k: random indexes

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0

Browser: Firefox 125

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Object.entries + for

5K/s

for..in

4K/s

Object.entries + for..of

4K/s

lodash.forOwn

4K/s

Object.entries.map

3K/s

lodash.each

3K/s

forEach

3K/s

lodash.map

3K/s

View exact numbers

Test name	Executions per second
✓ Object.entries + for	4,634 Ops/sec
for..in	3,992 Ops/sec
Object.entries + for..of	3,830 Ops/sec
lodash.forOwn	3,634 Ops/sec
Object.entries.map	3,306 Ops/sec
lodash.each	3,265 Ops/sec
forEach	3,213 Ops/sec
lodash.map	2,646 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js"></script>

Script Preparation code:

function dec2hex (dec) {
  return ('0' + dec.toString(16)).substr(-2)
}

function generateId (len) {
  var arr = new Uint8Array((len || 40) / 2)
  window.crypto.getRandomValues(arr)
  return Array.from(arr, dec2hex).join('')
}

var obj = {};

for (var i=0; i<10000; i++) {
  var id = generateId(20)
  obj[id] = i;
}

Tests:

lodash.each
_.each(obj, function(v, k) {})
lodash.map
_.map(obj, function(v, k) {})
Object.entries.map
Object.entries(obj).map(function([k, v]) {})
Object.entries + for
const entries = Object.entries(obj); for (let i = 0; i < entries.length; i++) { const [k, v] = entries[i]; }
Object.entries + for..of
for (let [k, v] of Object.entries(obj)) { // }
forEach
Object.keys(obj).forEach(function (k) { let v = obj[k]; // });
for..in
for (const k in obj) { if (obj.hasOwnProperty(k)) { let v = obj[k]; } }
lodash.forOwn
_.forOwn(obj, function(v, k) { // });