Benchmark: lodash vs deepmerge

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.6.2/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); const x = { foo: { bar: 3 }, array: [{ does: 'work', too: [ 1, 2, 3 ] }] } const y = { foo: { baz: 4 }, quux: 5, array: [{ does: 'work', too: [ 4, 5, 6 ] }, { really: 'yes' }] } var z = _.merge({}, x, y);
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); const x = { foo: { bar: 3 }, array: [{ does: 'work', too: [ 1, 2, 3 ] }] } const y = { foo: { baz: 4 }, quux: 5, array: [{ does: 'work', too: [ 4, 5, 6 ] }, { really: 'yes' }] } var z = deepmerge({}, x, y);

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:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's dive into the explanation of the provided benchmark.

**Overview**

The benchmark is comparing two JavaScript libraries: Lodash and DeepMerge. The goal is to determine which library performs better when it comes to merging two objects with similar structures.

**What are we testing?**

We're testing how each library merges two objects, `a` and `b`, which have overlapping properties (`c` and `{ c: ... }`). We're also creating a new object `x` and `y` with different properties and nested arrays. The goal is to merge these two objects using Lodash and DeepMerge.

**Options being compared**

There are two options being compared:

1. **Lodash**: The Lodash library provides a `merge` function that can be used to merge two objects.
2. **DeepMerge**: The DeepMerge library is specifically designed for merging objects with similar structures, making it a suitable alternative to Lodash.

**Pros and Cons**

Here are some pros and cons of each approach:

* **Lodash**:
	+ Pros: Well-established library with a large community, extensive feature set.
	+ Cons: Overkill for simple object merging, may introduce unnecessary overhead.
* **DeepMerge**:
	+ Pros: Lightweight and optimized for object merging, can be more efficient than Lodash.
	+ Cons: May not handle complex edge cases as well as Lodash.

**Other considerations**

When evaluating the performance of these libraries, it's essential to consider factors like:

* Object size and complexity
* Number of nested properties
* Array lengths and types

**Library explanations**

In the provided benchmark, we can see that:

* **Lodash**: The `merge` function is used to merge two objects. Lodash provides a flexible way to merge objects, but may introduce unnecessary overhead for simple cases.
* **DeepMerge**: The `deepmerge` function is specifically designed for merging objects with similar structures. DeepMerge is optimized for performance and can handle complex edge cases more effectively than Lodash.

**Special JavaScript features**

There are no special JavaScript features or syntax mentioned in the benchmark that would require specific handling or consideration.

**Alternatives**

If you're looking for alternative libraries for object merging, some options include:

* **Immer**: A library designed specifically for mutative state management and object merging.
* **Object.assign()**: The built-in `assign` method can be used to merge objects, but may not handle complex cases as well as Lodash or DeepMerge.

Keep in mind that the choice of library ultimately depends on your specific use case, performance requirements, and personal preference.

Related benchmarks:

lodash vs deepmerge (version: 0)

Comparing performance of: lodash vs deepmerge

Created: 5 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):