Benchmark: Array.prototype.concat vs spread operator

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Tests:

lodash merge
var _ = require('lodash'); var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = _merge(a, b);
spread operator
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
lodash merge
spread operator

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 break down the provided benchmark and its components.

**Overview**

The benchmark is comparing two approaches for merging objects in JavaScript: the traditional `concat()` method and the new ES6 spread operator (`...`). The benchmark is testing which approach is faster on modern browsers, specifically Chrome 65 running on a Mac OS X 10.12.6 device platform.

**Benchmark Definition JSON**

The provided benchmark definition JSON contains two main sections:

1. **General Benchmark Information**
	* `Name`: The name of the benchmark, which is "Array.prototype.concat vs spread operator".
	* `Description`: A brief description of the benchmark, explaining that it compares two approaches for merging objects.
	* `Script Preparation Code` and `Html Preparation Code`: These sections are empty in this example, but they can contain code to prepare the environment for the benchmark. Since they're empty, we'll focus on the individual test cases.

2. **Individual Test Cases**
	* The benchmark contains two test cases:
		+ "lodash merge": This test case uses the `lodash` library to merge two objects.
			- Library: `lodash`
			- Purpose: `lodash` is a utility library that provides a lot of functionality for tasks like array manipulation, object merging, and more. In this case, it's being used to simplify the merging process by providing an `_merge()` function.
		+ "spread operator": This test case uses the new ES6 spread operator (`...`) to merge two objects.

**Approaches Compared**

The benchmark is comparing two approaches:

1. **Lodash Merge**: Using the `lodash` library, which provides a simple and efficient way to merge objects.
2. **Spread Operator**: Using the new ES6 spread operator (`...`) to merge objects.

**Pros and Cons of Each Approach**

Here's a brief summary of the pros and cons of each approach:

1. **Lodash Merge**
	* Pros:
		+ Fast and efficient
		+ Simple and easy to use
	* Cons:
		+ Requires an external library (`lodash`)

2. **Spread Operator**
	* Pros:
		+ Native JavaScript support, no external libraries needed
		+ Easy to read and understand
	* Cons:
		+ May not be supported in older browsers or versions of JavaScript

**Other Considerations**

When choosing between these approaches, consider the following factors:

* Performance: If speed is critical, the `lodash` merge might be a better choice due to its optimized implementation.
* Complexity: The spread operator can make code more readable and easier to understand, especially for simple merging operations.
* Browser Support: Since the benchmark is running in Chrome 65 on a Mac OS X device platform, you can assume that both approaches will work. However, if you need to support older browsers or versions of JavaScript, the `lodash` merge might be a better choice.

**Alternatives**

If you don't want to use either the spread operator or `lodash`, you could consider other alternatives for merging objects:

* Using the `Object.assign()` method
* Creating a custom merger function using recursion or iterative approaches
* Utilizing other libraries, like `immer` or `reducer`, that provide more advanced merging functionality

Keep in mind that these alternatives might have different trade-offs in terms of performance, complexity, and browser support.

Related benchmarks:

Array.prototype.concat vs spread operator (version: 0)

Compare the new ES6 spread operator with the traditional concat() method

Comparing performance of: lodash merge vs spread operator

Created: 8 years ago by: Guest

Jump to the latest result

lodash merge

spread operator

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):