Benchmark: Uniq ES6 vs Lodash Uniq

HTML Preparation code:

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

Tests:

Use ES6
const uniqArr = (arrArg) => arrArg.filter((elem, pos, arr) => arr.indexOf(elem) == pos); const arr = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return uniqArr(arr)
Use Lodash
const arr = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return _.uniq(arr);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Use ES6
Use Lodash

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser/OS: Chrome 119 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Use ES6	9686677.0 Ops/sec
Use Lodash	9794228.0 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 definition and test cases.

**Benchmark Definition**

The benchmark is to compare two approaches for removing duplicates from an array:

1. **ES6 Filter Unique**: This approach uses JavaScript's built-in `filter` method to create a new array with only unique elements. The filter callback function checks if an element is present at the same index in the original array using `arr.indexOf(elem) == pos`. If true, the element is not included in the new array.
2. **Lodash Uniq**: This approach uses the popular utility library Lodash's `uniq` function to remove duplicates from the array.

**Options Compared**

The two options being compared are:

* ES6 Filter Unique
* Lodash Uniq

**Pros and Cons of Each Approach**

1. **ES6 Filter Unique**:
	* Pros:
		+ Native JavaScript implementation, no external dependencies.
		+ Can be more efficient since it doesn't require a separate library.
	* Cons:
		+ Requires knowledge of the `filter` method and its callback function.
		+ Might not be as readable or maintainable for complex filtering scenarios.
2. **Lodash Uniq**:
	* Pros:
		+ Conveniently available through Lodash, reducing code duplication.
		+ Easier to understand and use, especially for those familiar with Lodash's API.
	* Cons:
		+ Requires an external dependency (Lodash), which may slow down page loads.
		+ Might be slower due to the additional library overhead.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a comprehensive set of functions for various tasks, such as array manipulation, string processing, and more. The `uniq` function in particular is used here to remove duplicates from an array.

**Special JS Feature/Syntax**

There doesn't appear to be any special JavaScript features or syntax being tested in this benchmark. However, it's worth noting that the use of `const` and arrow functions (`=>`) for defining the benchmark definitions follows modern JavaScript best practices.

**Other Alternatives**

If you prefer not to use Lodash or native JavaScript, other alternatives for removing duplicates from an array include:

* **Array.prototype.reduce()**: You can use `reduce()` to accumulate unique elements in an array.
* **Set data structure**: You can convert the array to a Set (if supported by your browser) and then iterate over it to preserve uniqueness.

Keep in mind that these alternatives might have different performance characteristics compared to Lodash's `uniq` function or native JavaScript `filter` method.

Related benchmarks:

Uniq ES6 vs Lodash Uniq (version: 0)

ES6 Filter Unique vs Lodash Uniq

Comparing performance of: Use ES6 vs Use Lodash

Created: 6 years ago by: Guest

Jump to the latest result

Use ES6

Use Lodash

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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