Benchmark: DEEPMERGE VS LODASH MERGE

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
<script src='https://unpkg.com/deepmerge@4.2.2/dist/umd.js'></script>

Tests:

lodash
var a = { a: 'oh', b: 'my', c: { a: 'a', b: { c: 'c' } } }; var b = { c: { b: { d: 'a' }, c: { d: 'd' } } }; var c = _.merge({}, a, b);
deepmerge
var a = { a: 'oh', b: 'my', c: { a: 'a', b: { c: 'c' } } }; var b = { c: { b: { d: 'a' }, c: { d: 'd' } } }; var c = deepmerge({}, a, b);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash
deepmerge

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmarking setup and explain what's being tested.

**What's being tested?**

The website [MeasureThat.net](https://measurethat.net/) provides a platform for users to create and run JavaScript microbenchmarks. The provided JSON data represents two test cases:

1. **Lodash Merge**: A test case that measures the performance of Lodash's `_.merge()` function.
2. **DeepMerge**: A test case that measures the performance of DeepMerge's `deepmerge()` function.

**Options being compared**

In both test cases, the following options are being compared:

*   Lodash's `_.merge()`
*   DeepMerge's `deepmerge()`

These functions are used to merge two objects together. The comparison aims to determine which function is faster and more efficient in merging complex object structures.

**Pros and Cons of different approaches**

Here are some pros and cons of each approach:

### Lodash's `_.merge()`

Pros:

*   Well-established library with a large community.
*   Provides a wide range of utility functions for working with objects.
*   Easy to use and understand.

Cons:

*   Can be slower due to the overhead of its implementation.
*   May not be optimized for performance in certain scenarios.

### DeepMerge's `deepmerge()`

Pros:

*   Optimized for performance, making it faster than Lodash's approach.
*   Provides a more lightweight solution with fewer dependencies.
*   Easier to maintain and update due to its smaller codebase.

Cons:

*   Less well-established library, which may result in fewer resources available online.
*   May require more manual configuration and optimization.

**Library usage: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for working with objects, arrays, and other data structures. Its `_.merge()` function is used to merge two or more objects together, handling various edge cases like null values and undefined properties. The `deepmerge` test case uses Lodash's `_.merge()` function as the baseline comparison.

**Special JS feature or syntax**

There are no specific JavaScript features or syntaxes mentioned in this benchmarking setup.

**Other alternatives**

If you're looking for alternative merge functions, here are a few options:

*   **Object.assign()**: A built-in JavaScript method that merges one or more source objects into a target object.
*   **Merge libraries**: Libraries like `merge-deep`, `obj-assign`, and `fast-async-merge` offer optimized merge functions for different use cases.

Keep in mind that the choice of merge function depends on your specific requirements, such as performance, ease of use, or compatibility with other libraries.

Related benchmarks:

DEEPMERGE VS LODASH MERGE (version: 0)

Comparing performance of: lodash vs deepmerge

Created: 4 years ago by: Guest

Jump to the latest result

lodash

deepmerge

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):