Benchmark: Spread Set vs Lodash uniq

HTML Preparation code:

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

Script Preparation code:


var arr = ['a', 'b', 'c', 'd', 'e', 'a', 'b', 'c', 'd', 'f', 'g', 'h', 'i', 'g', 'h', 'i', 'j', 'k'];

Tests:

Spread Set
const uniq1 = [...new Set(arr)]
lodash uniq
const uniq2 = _.uniq(arr)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Spread Set
lodash uniq

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 and explain what's being tested.

**Benchmark Overview**

The benchmark is designed to compare two approaches for removing duplicates from an array: using the spread operator (`...`) in conjunction with `Set` objects, and using the Lodash library's `uniq` function. The goal is to determine which approach is faster and more efficient.

**Options Being Compared**

There are two options being compared:

1. **Spread Set**: This option uses the spread operator (`...`) to create a new array from an existing one, and then passes this new array to the `Set` constructor. The `Set` object automatically removes duplicates from the array. Finally, the spread operator is used again to convert the set back into an array.
2. **Lodash uniq**: This option uses the Lodash library's `uniq` function to remove duplicates from the input array.

**Pros and Cons of Each Approach**

**Spread Set:**

Pros:

* Fast and efficient, as it leverages the optimized implementation of `Set` objects in modern JavaScript engines.
* Easy to implement, requiring only a few lines of code.
* Can be used with any array data type, not just numeric or string values.

Cons:

* Requires two separate operations (creating the set and then converting it back to an array), which may incur additional overhead.
* May have performance variations depending on the JavaScript engine and platform being used.

**Lodash uniq:**

Pros:

* Highly optimized for performance by Lodash's developers.
* Easy to use, as it provides a simple and concise API for removing duplicates.
* Can handle various data types, including non-numeric and non-string values.

Cons:

* External dependency on the Lodash library, which may add overhead due to the need to load the library and perform any necessary initialization.
* May have performance variations depending on the JavaScript engine, platform, and version of Lodash being used.

**Library Used**

The benchmark uses the Lodash library, which is a popular utility library for JavaScript that provides various functions for tasks like data manipulation, string manipulation, and more. In this case, the `uniq` function is used to remove duplicates from an array.

**Special JS Features or Syntax**

This benchmark does not use any special JavaScript features or syntax beyond what's standard in modern JavaScript engines. It relies solely on basic language constructs and built-in functions.

**Other Alternatives**

If you wanted to write a similar benchmark, you could also explore other approaches for removing duplicates from an array, such as:

* Using `Array.prototype.filter()` in conjunction with a callback function.
* Implementing a custom solution using bitwise operations or other low-level techniques.

However, keep in mind that these alternatives might not be optimized like the Spread Set approach or Lodash's `uniq` function.

Related benchmarks:

Spread Set vs Lodash uniq (version: 0)

Comparing performance of: Spread Set vs lodash uniq

Created: 6 years ago by: Guest

Jump to the latest result

Spread Set

lodash uniq

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):