Benchmark: Lodash Uniq vs Javascript Set2

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.5/lodash.min.js"></script>

Script Preparation code:

var firstEqual = [];
var secondEqual = [];

for (var i=0; i<=1000000; i++) {
  firstEqual.push(i);
  secondEqual.push(i);
}

var arrayToDedup = [...firstEqual, ...secondEqual];

Tests:

Lodash Uniq
_.uniq(arrayToDedup);
Javascript Set
[...new Set(arrayToDedup)]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash Uniq
Javascript Set

Fastest: N/A

Slowest: N/A

Latest run results:

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

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

**Benchmark Definition**

The benchmark is testing two different approaches to remove duplicates from an array:

1. **Lodash Uniq**: This approach uses the Lodash library, which provides a function `uniq` that returns a new array with unique elements.
2. **Javascript Set**: This approach uses JavaScript's built-in `Set` data structure to remove duplicates.

**Options being compared**

The benchmark is comparing the performance of these two approaches:

* Lodash Uniq
* Javascript Set

**Pros and Cons**

Here are some pros and cons of each approach:

* **Lodash Uniq**:
	+ Pros: Easy to use, well-tested, provides a consistent output.
	+ Cons: Requires an external library (Lodash), may have overhead due to the library's size and complexity.
* **Javascript Set**:
	+ Pros: No external dependencies, lightweight, uses JavaScript's built-in data structure.
	+ Cons: May not provide a predictable or consistent output for very large inputs, can be slower due to the need to convert the array to an object (Set) and back.

**Library - Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as data manipulation, string manipulation, and more. The `uniq` function in particular is designed to remove duplicates from an array while preserving order.

**Special JS feature - Spread operator (`...`)**

The benchmark uses the spread operator (`...`) to convert arrays to new arrays. This syntax was introduced in ECMAScript 2015 (ES6) and allows for more concise way of creating arrays by spreading elements into a new array.

**Other alternatives**

If you want to implement this benchmark yourself, here are some other approaches you could consider:

* Using `Array.prototype.filter()` and checking for equality using `===`
* Using `Array.prototype.reduce()` with a custom reduce function
* Using a custom implementation of the `Set` data structure in JavaScript (although this would likely be slower than the built-in `Set`)

Keep in mind that these alternatives may not provide the same level of performance or consistency as the benchmarked approaches.

Related benchmarks:

Lodash Uniq vs Javascript Set2 (version: 0)

Comparing performance of: Lodash Uniq vs Javascript Set

Created: 7 years ago by: Guest

Jump to the latest result

Lodash Uniq

Javascript Set

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):