Run results for: lodash vs for-of vs forEach

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0

Browser: Firefox 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

vanilla for-loop w/ Object.values (no keys)

8K/s

native forEach w/ Object.values (no keys)

6K/s

vanilla for-loop w/ Object.keys

3K/s

lodash.each

2K/s

native forEach w/ entries

1K/s

vanilla for-loop w/ Object.entries

1K/s

native for-of w/ entries

1K/s

native for-in

502/s

View exact numbers

Test name	Executions per second
✓ vanilla for-loop w/ Object.values (no keys)	7,869 Ops/sec
native forEach w/ Object.values (no keys)	6,266 Ops/sec
vanilla for-loop w/ Object.keys	2,835 Ops/sec
lodash.each	2,050 Ops/sec
native forEach w/ entries	1,482 Ops/sec
vanilla for-loop w/ Object.entries	1,260 Ops/sec
native for-of w/ entries	1,031 Ops/sec
native for-in	502 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:

var obj = Array.from({ length: 10000 }).map((value, i) => i).reduce((val, v) => { val[v] = v; return val; }, {})

Tests:

lodash.each
_.each(obj, function(v,k) {})
native for-of w/ entries
for (const [k, v] of Object.entries(obj)) {}
native forEach w/ entries
Object.entries(obj).forEach(function(v, k) {})
vanilla for-loop w/ Object.keys
const keys = Object.keys(obj); for (let i = 0; i < keys.length; i++) { const v = obj[keys[i]]; }
vanilla for-loop w/ Object.entries
const entries = Object.entries(obj); for (let i = 0; i < entries.length; i++) { const [k, v] = entries[i]; }
vanilla for-loop w/ Object.values (no keys)
const values = Object.values(obj); for (let i = 0; i < values.length; i++){ }
native forEach w/ Object.values (no keys)
Object.values(obj).forEach(function(v) {})
native for-in
for (const prop in obj) { if (obj.hasOwnProperty(prop)) { const v = obj[prop]; } }