Benchmark: lodash merge vs deepmerge ( 14.17.15 - 4.3.0 )

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js'></script>
<script src='https://unpkg.com/deepmerge@4.3.0/dist/umd.js'></script>

Tests:

lodash merge
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 merge
Deepmerge

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the explanation of the benchmark.

**What is being tested?**

The provided JSON represents two JavaScript microbenchmarks: Lodash `merge` and Deepmerge. The benchmarks compare the performance of these two functions in merging two objects (`a` and `b`) into a new object (`c`). Specifically, they test how quickly each function can produce the merged object.

**Options compared:**

* Lodash `merge`: This is a utility function provided by the popular JavaScript library Lodash. It returns a new object that is the result of merging two or more objects together.
* Deepmerge: This is another JavaScript library that provides a simple and efficient way to merge objects. It also returns a new object with the merged properties.

**Pros and Cons of each approach:**

* **Lodash `merge`:**
	+ Pros:
		- Widely used and well-maintained library
		- Supports merging multiple objects at once
		- Has a large community of users and contributors
	+ Cons:
		- Can be slower due to its object creation overhead
		- May not be suitable for very large datasets
* **Deepmerge:**
	+ Pros:
		- Optimized for performance and memory efficiency
		- Supports merging multiple objects at once
		- Smaller in size compared to Lodash, which can lead to faster loading times
	+ Cons:
		- Less widely used than Lodash, which may result in fewer contributors and less community support

**Library usage:**

* Both benchmarks use two libraries: Lodash (`lodash.js`) and Deepmerge (`deepmerge@4.3.0/dist/umd.js`). The scripts for these libraries are included directly from CDN servers.
	+ Library purpose:
		- Lodash is a general-purpose utility library that provides various functions, including `merge`, which is used in this benchmark.
		- Deepmerge is specifically designed to merge objects efficiently.

**Special JS features or syntax:**

There are no special JavaScript features or syntax mentioned in the provided code snippets. The focus is on comparing the performance of two libraries.

**Other alternatives:**

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

* `lodash.merge` (part of Lodash)
* `merge` from the `underscore.js` library
* `mergeObjects` from the `ramda` library
* `merge` from the `fastjson-stamp` library

Keep in mind that each of these alternatives may have different performance characteristics and trade-offs compared to Lodash and Deepmerge.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Browser/OS: Chrome 110 on Windows

View result in a separate tab

Test name	Executions per second
lodash merge	226390.9 Ops/sec
Deepmerge	559329.3 Ops/sec

Related benchmarks:

lodash merge vs deepmerge ( 14.17.15 - 4.3.0 ) (version: 0)

Comparing performance of: lodash merge vs Deepmerge

Created: one year ago by: Registered User

Jump to the latest result

lodash merge

Deepmerge

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):