Benchmark: Loop over object: lodash vs Object.entries fork by d9k: random indexes

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) { // });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash.each
lodash.map
Object.entries.map
Object.entries + for
Object.entries + for..of
forEach
for..in
lodash.forOwn

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
lodash.each	1156.9 Ops/sec
lodash.map	1102.3 Ops/sec
Object.entries.map	615.3 Ops/sec
Object.entries + for	665.3 Ops/sec
Object.entries + for..of	656.6 Ops/sec
forEach	854.4 Ops/sec
for..in	644.9 Ops/sec
lodash.forOwn	1155.7 Ops/sec

Loop over object: lodash vs Object.entries fork by d9k: random indexes (version: 0)

Comparing performance of: lodash.each vs lodash.map vs Object.entries.map vs Object.entries + for vs Object.entries + for..of vs forEach vs for..in vs lodash.forOwn

Created: 4 years ago by: Registered User

Jump to the latest result

lodash.each

lodash.map

Object.entries.map

Object.entries + for

Object.entries + for..of

forEach

for..in

lodash.forOwn

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A