Benchmark: Object.assign vs Lodash.assign (Lodash 3)

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@3.10.1/index.min.js"></script>

Script Preparation code:

var person = {name: 'Frederick', lastName: 'Corcino Alejo'};

Tests:

Lodash Assign
_.assign({}, person, {age: 15, favorite_color: "red"});
Native Assign
Object.assign({}, person, {age: 15, favorite_color: "red"});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash Assign
Native Assign

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the provided benchmark.

**What is being tested:**

The benchmark measures the performance of two approaches to assign properties to an object:

1. **Native `Object.assign`**: This method is part of the native JavaScript API, which means it's implemented in the browser's engine (in this case, Chrome).
2. **Lodash `_.assign`**: Lodash is a popular utility library for JavaScript that provides various functions for tasks like array manipulation and object assignment.

**Options compared:**

The benchmark compares the execution time of both approaches when assigning properties to an object using the `person` variable defined in the script preparation code. The test case uses the `_.assign` function from Lodash, which takes two objects as arguments and merges their properties into a new object.

**Pros and Cons of each approach:**

1. **Native `Object.assign`**:
	* Pros:
		+ Fast execution time due to being implemented in the browser's engine.
		+ Widely supported and well-maintained.
	* Cons:
		+ May not provide additional benefits for simple object assignments.
		+ Can be less readable or intuitive than using a library like Lodash.
2. **Lodash `_.assign`**:
	* Pros:
		+ Provides a more explicit and readable way to merge objects.
		+ Offers additional features, such as handling null or undefined values.
	* Cons:
		+ Slower execution time compared to native `Object.assign`.
		+ Requires including the Lodash library in the project.

**Library description:**

Lodash is a utility library for JavaScript that provides various functions for tasks like array manipulation, object assignment, and more. In this benchmark, the `.assign` function from Lodash is used to merge properties from two objects into a new object.

**Special JS feature or syntax:**

None mentioned in this specific benchmark, but some other notable features include:

* **Arrow functions**: Used in script preparation code to define small anonymous functions.
* **Template literals**: Used in HTML preparation code to create a simple HTML template.

**Other alternatives:**

For object assignment, you can also use the following approaches:

1. **`Object.assign()` with an empty object**: `Object.assign({}, person, {age: 15, favorite_color: "red"})`
2. **Using the spread operator (`...`)**: `{ ...person, age: 15, favorite_color: "red" }`

These alternatives may have slightly different performance characteristics or readability trade-offs compared to native `Object.assign` and Lodash `.assign`.

Related benchmarks:

Object.assign vs Lodash.assign (Lodash 3) (version: 0)

Measuring approaches performance

Comparing performance of: Lodash Assign vs Native Assign

Created: 6 years ago by: Registered User

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Lodash Assign

Native Assign

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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