Benchmark: lodash assign vs object.assign vs spread asdfdsfasdfdsd

HTML Preparation code:

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

Tests:

lodash merge
var a = { a: 'oh', b: 'my' }; var b = { a: 'goddess', b:'dirty dan' }; _.assign(a, b);
object.assign
var a = { a: 'oh', b: 'my' }; var b = { a: 'goddess', b:'dirty dan' }; Object.assign(a, b);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash merge
object.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 and explain what's being tested.

**Benchmark Definition**
The benchmark is defined in JSON, which provides information about the test cases and execution environment. The main points are:

* **Name**: The name of the benchmark, which describes the test case: "lodash assign vs object.assign vs spread asdfdsfasdfdsd".
* **Description**: A brief description of what's being tested, which is "testing object assignment while keeping references to source".
* **Script Preparation Code** and **Html Preparation Code**: These fields are empty in this benchmark definition, but they typically contain code that sets up the test environment. Since they're empty, we'll need to assume the tests are already set up correctly.

**Individual Test Cases**
The benchmark consists of two individual test cases:

1. **Test Case 1: "lodash merge"**: This test case uses Lodash's `assign` function to merge two objects.
2. **Test Case 2: "object.assign"`: This test case uses the built-in JavaScript `Object.assign` method to merge two objects.

**Libraries and Features**
In this benchmark, we're using:

* **Lodash**: A popular JavaScript library for functional programming tasks. In this case, it's used for its `assign` function.
* **JavaScript Object Assign**: The built-in JavaScript method `Object.assign`, which is used to merge two or more objects.

**Options Compared**
The two test cases are comparing the performance of:

1. **Lodash's `assign` function**: This implementation merges the two objects using a specific algorithm.
2. **JavaScript's `Object.assign` method**: This method also merges two objects, but uses a different algorithm under the hood.

**Pros and Cons**

* **Lodash's `assign` function**:
	+ Pros: Often used in real-world code due to its widespread adoption; may provide better performance for certain use cases.
	+ Cons: An additional dependency is introduced (Lodash), which may not be desirable in all situations.
* **JavaScript's `Object.assign` method**:
	+ Pros: Built-in, no additional dependencies needed; often considered a safer choice due to its simplicity.
	+ Cons: May have performance issues or unexpected behavior in certain edge cases.

**Other Considerations**
When choosing between Lodash's `assign` function and JavaScript's `Object.assign` method:

* If you need more control over the merge process, Lodash's implementation might be a better choice. However, if simplicity is key and you're confident in using the standard `Object.assign` method, it's likely sufficient.
* Be aware that performance differences may not always be significant, especially for simple objects. More complex merges or large datasets might reveal performance disparities.

**Alternative Implementations**
For completeness, some alternative implementations of object assignment include:

* Using the spread operator (`{...obj1, ...obj2}`)
* Using `Object.create()` and `Object.assign()`
* Writing a custom implementation using loops or recursion

Keep in mind that these alternatives may not offer significant performance improvements over Lodash's `assign` function or JavaScript's `Object.assign` method.

Related benchmarks:

lodash assign vs object.assign vs spread asdfdsfasdfdsd (version: 0)

testing object assignment while keeping references to source

Comparing performance of: lodash merge vs object.assign

Created: 6 years ago by: Guest

Jump to the latest result

lodash merge

object.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):