Benchmark: _.uniq() vs Set()

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.11/lodash.min.js"></script>

Tests:

lodash uniq
const arr = [1,1,3]; const a2 = _.uniq(arr);
Set
const arr = [1,1,3]; const a2 = [...new Set(arr)];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash uniq
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):

LLMs can make mistakes. Check important info.

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

**Overview**
The benchmark compares the performance of two approaches to remove duplicate elements from an array: `_.uniq()` from the Lodash library and `Set` (a built-in JavaScript data structure).

**Options Compared**

1. **Lodash `_`**: The `_.uniq()` function is a utility function provided by the Lodash library, which removes duplicates from an array while preserving the original order.
2. **Built-in `Set`**: A `Set` is a built-in JavaScript data structure that automatically removes duplicate elements when used as an array.

**Pros and Cons**

1. **Lodash `_`**:
	* Pros: Preserves the original order of elements, handles nested arrays, and provides other useful functionality.
	* Cons: Adds extra overhead due to the library itself, might be slower than a simple `Set` approach for large datasets.
2. **Built-in `Set`**:
	* Pros: Fast, lightweight, and easy to use.
	* Cons: Preserves no order of elements, can't handle nested arrays out-of-the-box.

**Library Used**
The Lodash library is used in the first test case (`"lodash uniq"`). It's a popular utility library that provides many useful functions for tasks like array manipulation, string manipulation, and more. In this case, `_.uniq()` is used to remove duplicates from an array while preserving the original order.

**Special JavaScript Features/Syntax**
None are mentioned in the benchmark definition or test cases.

**Other Alternatives**

For removing duplicate elements from an array, other alternatives besides Lodash `_` and built-in `Set` could be:

* Using a custom implementation with a loop to remove duplicates
* Utilizing other libraries like `Array.prototype.unique()` (not widely supported) or `lodash.atmost()` (which is similar to `_.uniq()`)
* Leveraging modern JavaScript features like `Map` or `WeakMap` to store unique elements

Keep in mind that the choice of approach often depends on the specific requirements and constraints of your project.

**Benchmark Preparation Code**
The benchmark preparation code includes a script tag pointing to an external copy of the Lodash library, which is used by the first test case. The second test case uses the `Set` constructor directly, without importing any external libraries.

I hope this explanation helps!

Related benchmarks:

_.uniq() vs Set() (version: 2)

Comparing performance of: lodash uniq vs Set

Created: 7 years ago by: Registered User

Jump to the latest result

lodash uniq

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):