Benchmark: Lodash.assign vs Object.assign

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.js"></script>

Script Preparation code:

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

Tests:

Lodash Assing
_.assign({}, person, {age: 15});
Native Assing
Object.assign({}, person, {age: 15});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash Assing
Native Assing

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:133.0) Gecko/20100101 Firefox/133.0

Browser/OS: Firefox 133 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
Lodash Assing	9078511.0 Ops/sec
Native Assing	28597130.0 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 in this JavaScript microbenchmark.

**Benchmark Definition**

The benchmark is comparing two approaches to perform an assignment operation on an object: `Lodash.assign` and `Object.assign`. The script preparation code creates a sample object `person` with some properties, including a nested property `lastName`.

**Options Compared**

Two options are being compared:

1. **Lodash.assign**: This function is part of the Lodash library, which provides a set of utility functions for JavaScript.
2. **Object.assign**: This is a native JavaScript method that performs an assignment operation on an object.

**Pros and Cons of Each Approach**

* **Lodash.assign**:
	+ Pros: Can handle nested objects, which can be more convenient than using `Object.assign`.
	+ Cons: Adds extra overhead due to the library's functionality, potentially slowing down performance.
* **Object.assign**:
	+ Pros: Native implementation, likely optimized for performance.
	+ Cons: May not work as expected with deeply nested objects or specific data structures.

In general, if you need to perform assignment operations on objects and don't care about additional features from Lodash, `Object.assign` might be a better choice. However, if you anticipate working with complex data structures or want the convenience of handling nested objects, `Lodash.assign` could be worth considering.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides various functions for tasks such as array manipulation, object creation, and string formatting. In this benchmark, `Lodash.assign` is used to perform an assignment operation on the `person` object.

**Special JS Feature or Syntax: None Mentioned**

There are no special JavaScript features or syntax being tested in this benchmark.

**Other Alternatives**

If you're looking for alternative ways to perform assignment operations on objects, you could consider:

* Using a different library, such as **Immer**, which provides a more efficient and safe way to update object state.
* Utilizing the `Spread operator` (`{ ... }`) or `Rest parameter` syntax (`...object`) to create new objects.
* Implementing your own assignment function using JavaScript's built-in methods, like `Object.keys()` and `forEach()`.

Keep in mind that these alternatives might have different performance characteristics or trade-offs, depending on the specific use case.

Related benchmarks:

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

Measuring approaches performance

Comparing performance of: Lodash Assing vs Native Assing

Created: 2 years ago by: Guest

Jump to the latest result

Lodash Assing

Native Assing

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):