Benchmark: Loop over object: lodash vs Object.entries vs Object.values vs Object.keys (lodash 4.17.15)

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/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.map
_.map(obj, function(v, k) {})
Object.entries.map
Object.entries(obj).map(function([k, v]) {})
vanilla for-loop w/ Object.entries
const entries = Object.entries(obj); for (let i = 0; i < entries.length; i++) { const [k, v] = entries[i]; }
lodash.forEach
_.forEach(obj, function(v, k) {})
Object.values
Object.values(obj).forEach(function(val, index) { const v = val; });
Object.keys
Object.keys(obj).forEach(function(key, index) { const k = key; });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash.map
Object.entries.map
vanilla for-loop w/ Object.entries
lodash.forEach
Object.values
Object.keys

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36

Browser/OS: Chrome 97 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
lodash.map	6670.7 Ops/sec
Object.entries.map	3341.4 Ops/sec
vanilla for-loop w/ Object.entries	3924.9 Ops/sec
lodash.forEach	6752.5 Ops/sec
Object.values	45547.2 Ops/sec
Object.keys	13954.2 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):

LLMs can make mistakes. Check important info.

Let's break down what's being tested on MeasureThat.net.

**Benchmark Definition**

The benchmark is designed to compare the performance of different approaches for iterating over an object in JavaScript:

1. `lodash` (Lodash) methods: `map`, `forEach`
2. Vanilla JavaScript methods: `Object.entries` with a `for` loop, `Object.values` with a `forEach` loop, and `Object.keys` with a `forEach` loop

**Options being compared**

Each option is being tested for its performance using the following metrics:

* Number of executions per second (ExecutionsPerSecond)

The options being compared are:

1. `lodash.map`
2. `lodash.forEach`
3. Vanilla JavaScript methods:
	* `Object.entries.map`
	* `Object.values.forEach`
	* `Object.keys.forEach`

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

1. **Lodash methods (map, forEach)**
	* Pros: More concise code, often more readable
	* Cons: May incur overhead due to function calls and closure creation
2. **Vanilla JavaScript methods (Object.entries, Object.values, Object.keys with for loop)**
	* Pros: No external dependencies, no potential overhead from closures
	* Cons: Code can be less concise and more verbose

**Library usage**

In this benchmark, the `lodash` library is being used to provide a set of utility functions that are commonly used in JavaScript development.

The `lodash` methods (`map`, `forEach`) use closures to iterate over the object, which can introduce additional overhead. The vanilla JavaScript methods (using `Object.entries`, `Object.values`, and `Object.keys`) do not rely on closures, making them potentially more efficient.

**Special JS features or syntax**

There are no special JavaScript features or syntaxes being used in this benchmark, such as async/await, promises, or ES6+ classes.

**Other alternatives**

Some other alternatives to Lodash for iterating over objects could include:

* `Array.prototype.forEach`
* `Array.prototype.map`
* Custom looping mechanisms using `for` loops or `while` loops
* Other libraries that provide similar functionality (e.g., underscore.js)

Overall, the benchmark is designed to help developers understand the performance implications of different approaches when iterating over objects in JavaScript.

Related benchmarks:

Loop over object: lodash vs Object.entries vs Object.values vs Object.keys (lodash 4.17.15) (version: 1)

Comparing performance of: lodash.map vs Object.entries.map vs vanilla for-loop w/ Object.entries vs lodash.forEach vs Object.values vs Object.keys

Created: 2 years ago by: Registered User

Jump to the latest result

lodash.map

Object.entries.map

vanilla for-loop w/ Object.entries

lodash.forEach

Object.values

Object.keys

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):