Benchmark: ramda merge vs object.assign vs spread

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/ramda/0.26.1/ramda.min.js'></script>

Tests:

Ramda merge
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = R.merge(a, b);
object.assign
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = Object.assign(a, b);
spread
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = { ...a, ...b };

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Ramda merge
object.assign
spread

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser/OS: Chrome 134 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Ramda merge	22849992.0 Ops/sec
object.assign	53466248.0 Ops/sec
spread	40972488.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Purpose**

The benchmark measures the performance of three different approaches to merge two objects:

1. Ramda `merge` function
2. `object.assign` method
3. Spread syntax (`{ ...a, ...b }`)

These three methods are compared in terms of their execution time and speed.

**Options Comparison**

Here's a brief overview of each option:

* **Ramda `merge` function**: This is a functional programming approach that merges two objects into a new object. It's a more explicit way of merging objects, but might be slower due to the overhead of function calls.
* **`object.assign` method**: This is a built-in JavaScript method that assigns properties from one or more source objects to a target object. It's a concise and efficient way to merge objects.
* **Spread syntax (`{ ...a, ...b }`)**: This is a modern JavaScript feature that allows you to merge two objects using the spread operator. It's a simple and expressive way to merge objects.

**Pros and Cons**

Here are some pros and cons of each approach:

* Ramda `merge` function:
	+ Pros: More explicit, easy to understand, and can be used with other functional programming tools.
	+ Cons: Might be slower due to the overhead of function calls.
* `object.assign` method:
	+ Pros: Concise, efficient, and widely supported.
	+ Cons: Not as explicit as Ramda's merge function, might not work well with certain data structures.
* Spread syntax (`{ ...a, ...b }`):
	+ Pros: Simple, expressive, and modern feature.
	+ Cons: Might be slower than `object.assign`, requires support for the spread operator.

**Library and Purpose**

The benchmark uses Ramda, a popular JavaScript library for functional programming. The purpose of using Ramda is to provide a consistent and predictable way to merge objects, which can help with code readability and maintainability.

**Special JS Feature or Syntax**

None of the tested methods use any special JavaScript features or syntax other than the spread operator, which is a modern feature introduced in ECMAScript 2018.

**Other Alternatives**

If you're looking for alternative ways to merge objects, here are some options:

* Lodash's `merge` function (similar to Ramda's `merge`)
* Underscore.js's `object.merge`
* JavaScript's built-in `Object.assign` method with a loop or recursion
* Custom implementation using array methods and object properties

Keep in mind that each approach has its own trade-offs, and the choice of which one to use depends on your specific use case and performance requirements.

Related benchmarks:

ramda merge vs object.assign vs spread (version: 0)

Comparing performance of: Ramda merge vs object.assign vs spread

Created: 7 years ago by: Guest

Jump to the latest result

Ramda merge

object.assign

spread

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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