Benchmark: Lodash Uniq vs Javascript Set spread operation

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<=10000; 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

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

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Let's dive into the benchmark.

**What is being tested?**

The provided JSON represents two microbenchmarks that compare the performance of Lodash's `uniq` function and JavaScript's built-in `Set` spread operation for deduplication on an array of numbers. The test creates an array with 10,000 elements, duplicates it, and then measures the time taken to run each benchmark.

**Options compared**

The two options being compared are:

1. **Lodash Uniq**: The `_uniq` function from the Lodash library is used to remove duplicate elements from the array.
2. **JavaScript Set spread operation**: A new `Set` object is created and its spread operator (`...`) is used to create a set of unique elements from the duplicated array.

**Pros and Cons**

* **Lodash Uniq**:
	+ Pros: Well-tested, widely used library, provides additional functionality (e.g., handling null/undefined values).
	+ Cons: Adds an external dependency, might be overkill for simple deduplication tasks.
* **JavaScript Set spread operation**:
	+ Pros: Built-in, no external dependencies, efficient use of memory.
	+ Cons: Requires modern JavaScript features (ECMAScript 2015 or later), can be slower due to the overhead of creating a set.

**Library and its purpose**

The Lodash library is a popular utility library for JavaScript that provides a wide range of functions for tasks like array manipulation, string processing, and more. The `uniq` function is specifically designed to remove duplicate elements from an array while preserving order.

**Special JS feature or syntax**

Neither benchmark uses any special JavaScript features or syntax beyond what's required for the test case. However, if you're interested in exploring other options, consider using modern JavaScript features like `flatMap()` or `reduce()`, which might offer better performance for similar use cases.

**Alternatives**

Other alternatives to Lodash Uniq and JavaScript Set spread operation include:

1. **Array.prototype.filter()**: Remove duplicate elements by filtering out duplicates using the same spread operation.
2. **Array.prototype.reduce()**: Use reduce to create a new array with unique elements, which can be more efficient than spreading an existing array.
3. **Array.prototype.map() + Array.prototype.from()**: Use map to transform each element and then from to convert the result back into an array, which might offer better performance for certain use cases.

Keep in mind that these alternatives may require additional setup or modifications to your code, so it's essential to test and validate their performance before making a decision.

Related benchmarks:

Lodash Uniq vs Javascript Set spread operation (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):