Benchmark: Lodash Uniq vs Javascript Set 222

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<=100000; 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 benchmark test case.

**What is tested?**

The provided benchmark tests two approaches to remove duplicates from an array:

1. **Lodash Uniq**: Uses the `lodash uniq` function, which returns a new array with unique values.
2. **JavaScript Set**: Uses the `Set` object in JavaScript, which automatically removes duplicate values when creating a set.

**Options compared**

The benchmark compares two options:

* Lodash Uniq: A library-based approach that uses an external library (`lodash`) to perform the duplicate removal.
* JavaScript Set: An inbuilt JavaScript approach that uses the `Set` object to remove duplicates.

**Pros and Cons of each approach**

**Lodash Uniq**

Pros:

* Written by a experienced developer, which means it's likely optimized for performance.
* Uses a tried-and-tested algorithm for removing duplicates.
* Can handle large datasets efficiently.

Cons:

* Requires an external library to be included in the benchmark (lodash).
* May have overhead due to the library being loaded and executed.

**JavaScript Set**

Pros:

* No external library required, reducing overhead.
* Built-in JavaScript functionality, which is typically optimized for performance.
* Fast and efficient removal of duplicates.

Cons:

* Requires a modern JavaScript engine that supports `Set` objects (which has become widely supported in recent years).
* May not perform as well on very large datasets due to the inherent limitations of the `Set` object (e.g., it uses a hash table, which can lead to collisions).

**Other considerations**

The benchmark also includes an HTML preparation code that loads the Lodash library for the "Lodash Uniq" test case. This suggests that the author wants to ensure that the Lodash library is available for this specific test case.

**Library description and purpose**

* **lodash**: A popular JavaScript utility library that provides a wide range of functions for various tasks, including array manipulation (like `uniq`). It's widely used in web development and other applications.
* **Set object**: A built-in JavaScript data structure that automatically removes duplicate values when creating a set. The Set object is implemented as a hash table, which makes it efficient for removing duplicates.

**Special JS feature or syntax**

This benchmark does not explicitly use any special JavaScript features or syntax. It relies on standard JavaScript functionality (like arrays and the `Set` object) to perform the tests.

Related benchmarks:

Lodash Uniq vs Javascript Set 222 (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):