Benchmark: Lodash clone VS spread operator

HTML Preparation code:

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

Script Preparation code:

var MyObject = {
  description: 'a',
  myNumber: 123456789,
  myBoolean: true,
};

var myCopy = null;

Tests:

Lodash cloneDeep
myCopy = _.clone(MyObject);
Spread operator
myCopy = {...MyObject};

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash cloneDeep
Spread operator

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 7 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36 OPR/120.0.0.0 (Edition Yx 08)

Browser/OS: Opera 120 on Windows

View result in a separate tab

Test name	Executions per second
Lodash cloneDeep	5107566.5 Ops/sec
Spread operator	16772802.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested, compared, and their pros and cons.

**Benchmark Overview**

The benchmark measures the performance of two approaches to create a copy of an object:

1. **Lodash cloneDeep**: Using the `_.cloneDeep()` function from the Lodash library.
2. **Spread operator**: Using the spread operator (`...`) to create a new object by spreading the properties of the original object.

**Lodash Library**

The Lodash library is a popular utility library for JavaScript that provides a wide range of functions for tasks such as array manipulation, object manipulation, and more. In this benchmark, `_.cloneDeep()` is used to create a deep copy of an object.

**Spread Operator**

The spread operator (`...`) is a new feature introduced in ECMAScript 2018 (ES8). It allows you to create a new object by spreading the properties of an existing object.

**Test Cases and Results**

The benchmark compares the performance of `_.cloneDeep()` and the spread operator for creating a copy of a small object (`MyObject`). The test cases are:

1. **Lodash cloneDeep**: Creates a deep copy of `MyObject` using Lodash's `_.cloneDeep()`.
2. **Spread operator**: Creates a new object by spreading the properties of `MyObject`.

The latest benchmark result shows that the spread operator outperforms `_.cloneDeep()` in terms of executions per second:

* Spread operator: 6033532.5 executions/second
* Lodash cloneDeep: 1740839.875 executions/second

**Pros and Cons**

**Lodash CloneDeep**

Pros:

* Provides a safe and efficient way to create deep copies of objects.
* Handles complex object graphs with ease.

Cons:

* Adds an extra dependency on the Lodash library.
* May have additional overhead due to the size of the library.

**Spread Operator**

Pros:

* Lightweight and doesn't add any dependencies.
* Fast and efficient for small objects.

Cons:

* Only works for simple objects and may not handle complex object graphs.
* May lead to unexpected behavior if not used carefully (e.g., modifying the original object).

**Other Alternatives**

If you don't want to use Lodash or the spread operator, other alternatives include:

* Using the `Object.assign()` method with the spread operator (`Object.assign({}, ...MyObject)`)
* Implementing a custom copying function that recursively clones objects
* Using a different library like Immutable.js (although this would add an extra dependency)

**Special JS Feature/Syntax**

Note that this benchmark does not rely on any special JavaScript features or syntax, so it should be accessible to most developers.

Related benchmarks:

Lodash clone VS spread operator (version: 0)

Comparing performance of: Lodash cloneDeep vs Spread operator

Created: 4 years ago by: Guest

Jump to the latest result

Lodash cloneDeep

Spread operator

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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