Benchmark: lodash merge vs deepmerge latest CDN

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>
<script src='https://unpkg.com/deepmerge@4.2.2/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.all
var a = { a: 'oh', b: 'my', c: { a: 'a', b: { c: 'c' } } }; var b = { c: { b: { d: 'a' }, c: { d: 'd' } } }; var c = deepmerge.all([{},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.all
deepmerge

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
lodash merge	645429.8 Ops/sec
deepmerge.all	456740.3 Ops/sec
deepmerge	667722.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks.

**What is being tested?**

The benchmark measures the performance of three different libraries for merging objects: Lodash, DeepMerge, and a custom implementation (DeepMerge.all). The tests focus on comparing the execution times of these libraries when merging two objects with nested structures.

**Options compared**

The three options being compared are:

1. **Lodash.merge**: A popular utility library that provides a versatile way to merge objects.
2. **DeepMerge**: A specialized library designed for deep object merging, which is optimized for performance and flexibility.
3. **DeepMerge.all**: A custom implementation of DeepMerge, likely used as a reference or for testing purposes.

**Pros and cons**

Here's a brief summary of each option:

* **Lodash.merge**: Pros:
	+ Wide adoption and large community support
	+ Comprehensive set of utility functions
	+ Well-documented and easy to use

Cons:
	+ May incur additional overhead due to its extensive feature set
	+ Not optimized for deep object merging specifically
* **DeepMerge**: Pros:
	+ Optimized for performance and flexibility in deep object merging
	+ Specifically designed for this task, reducing overhead compared to Lodash.merge
	+ Well-performing and efficient

Cons:
	+ May not have the same breadth of features as Lodash.merge
	+ Less widely adopted and community support may be smaller
* **DeepMerge.all**: Pros:
	+ Custom implementation that can be optimized for specific use cases (in this case, likely serving as a reference or test implementation)

Cons:
	+ Not widely used or maintained outside of the benchmarking context
	+ May not represent a production-ready solution

**Library usage and special features**

* **Lodash**: The popular utility library used by Lodash.merge. It provides an extensive set of functions for manipulating data, including merging objects.
* **DeepMerge**: A specialized library designed specifically for deep object merging. It's optimized for performance and flexibility in this specific task.

No special JavaScript features or syntax are used in these benchmarks.

**Alternatives**

If you're looking for alternatives to DeepMerge for deep object merging, some options include:

1. **Immutable.js**: A library that provides immutable data structures and a set of utility functions for working with them.
2. **Ramda**: A functional programming library that includes a set of higher-order functions for manipulating data, including merging objects.
3. **Underscore.js**: Another popular utility library that provides a range of functions for manipulating data, including merging objects.

Keep in mind that each of these alternatives has its own strengths and weaknesses, and may not offer the same level of performance or flexibility as DeepMerge.

Related benchmarks:

lodash merge vs deepmerge latest CDN (version: 3)

Comparing performance of: lodash merge vs deepmerge.all vs deepmerge

Created: 3 years ago by: Registered User

Jump to the latest result

lodash merge

deepmerge.all

deepmerge

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):