Benchmark: lodash uniq vs set + spread

HTML Preparation code:


<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js'></script>

Tests:

Set + spread
var l = [...new Set([1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7])]; return l;
Array
var l = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return _.uniq(l);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Set + spread
Array

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 Definition**

The benchmark definition provides two test cases, each comparing a different approach to remove duplicates from an array:

1. **Set + spread**: This approach uses the `Set` object and the spread operator (`...`) to create a new array with unique elements. The idea is to add each element of the original array to a set, which automatically removes duplicates. Then, the spread operator is used to convert the set back into an array.
2. **Array**: This approach uses the `uniq()` function from the Lodash library to remove duplicates from the array.

**Options Compared**

The two approaches being compared are:

* Set + spread: using the `Set` object and the spread operator
* Array: using the Lodash `uniq()` function

**Pros and Cons of Each Approach**

1. **Set + spread**:
	* Pros:
		+ Simple to understand and implement.
		+ Works well for small arrays.
	* Cons:
		+ Can be slower than other approaches, especially for large arrays.
		+ Requires the use of a `Set` object, which may not be available in all browsers or environments.
2. **Array** (Lodash `uniq()`):
	* Pros:
		+ Faster and more efficient than the set + spread approach.
		+ Works well with large arrays.
	* Cons:
		+ Requires the use of a library (Lodash) which may not be available in all environments.
		+ Can be less intuitive to understand for those unfamiliar with Lodash.

**Library: Lodash**

The `uniq()` function is part of the Lodash library, which provides a collection of small, reusable functions that can be used to perform common tasks. The `uniq()` function removes duplicates from an array while preserving the original order.

**Special JavaScript Feature/ Syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark.

**Alternative Approaches**

Other approaches to remove duplicates from an array include:

* Using the `filter()` method with a callback function.
* Using a regular expression to match duplicate elements and then removing them.
* Using a `Map` object instead of a `Set` object (although this is not being tested in this benchmark).

It's worth noting that the choice of approach often depends on the specific requirements of the project, such as performance, readability, and compatibility with different browsers or environments.

Related benchmarks:

lodash uniq vs set + spread (version: 0)

Comparing performance of: Set + spread vs Array

Created: 4 years ago by: Guest

Jump to the latest result

Set + spread

Array

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):