Benchmark: lodash vs set array

HTML Preparation code:

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

Tests:

Set + array
var l = Array.from(new Set([1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7])); return l;
lodash
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 + array
lodash

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.

I'll explain the benchmark and its results in a way that's easy to understand for software engineers of all levels.

**Benchmark Overview**

The benchmark compares the performance of two approaches:

1. Converting an array to a set (using `Array.from(new Set())`).
2. Using the `_.uniq()` function from the Lodash library (`var l = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return _.uniq(l);`).

**Options Compared**

The two options being compared are:

* Converting an array to a set using the `Array.from()` method and the `Set` constructor.
* Using the `_.uniq()` function from Lodash library to remove duplicates from the array.

**Pros and Cons of Each Approach**

1. **Converting Array to Set**
	* Pros:
		+ More efficient for large datasets since it uses a data structure that automatically removes duplicates.
		+ Can be faster because sets are implemented as hash tables, which provide O(1) lookup times.
	* Cons:
		+ May require more memory since sets store all elements in an array under the hood.
		+ Not suitable for scenarios where preserving the original order of elements is important.
2. **Lodash _.uniq()**
	* Pros:
		+ Preserves the original order of elements, which can be important in some cases.
		+ Does not require creating a new data structure (set or array).
	* Cons:
		+ May be slower for large datasets since it uses an iterative approach to remove duplicates.

**Library and Its Purpose**

The Lodash library is a popular utility library that provides a wide range of functions for tasks like string manipulation, array manipulation, and more. In this benchmark, `_.uniq()` is used to remove duplicates from the input array.

**Special JS Feature or Syntax (Not Applicable in This Case)**

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

**Other Alternatives**

If you're interested in exploring alternative approaches for removing duplicates from arrays, here are a few options:

* Using `Array.prototype.filter()` with an arrow function to remove duplicates.
* Using `Map` objects to keep track of unique values.
* Implementing your own custom solution using JavaScript's built-in data structures.

For example, the first approach could be implemented as follows:
```javascript
var l = [];
for (const elem of arr) {
  if (!l.includes(elem)) {
    l.push(elem);
  }
}
return l;
```
However, this implementation has a time complexity of O(n^2), which is less efficient than using `Array.from()` and the `Set` constructor.

In summary, the benchmark provides a comparison between two approaches for removing duplicates from arrays: converting to a set and using Lodash's `_.uniq()`. The choice of approach depends on the specific requirements of your use case, such as performance, memory usage, and preserving original order.

Related benchmarks:

lodash vs set array (version: 0)

Comparing performance of: Set + array vs lodash

Created: 4 years ago by: Guest

Jump to the latest result

Set + array

lodash

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):