Benchmark: Lodash Uniq vs Javascript Set #2

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<=500000; 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 dive into the world of JavaScript microbenchmarks.

**Benchmark Overview**

The provided JSON represents a benchmark test case that compares two approaches to remove duplicates from an array: using Lodash's `uniq` function and the built-in `Set` data structure in JavaScript. The test creates two arrays, `firstEqual` and `secondEqual`, each with 500,000 elements, and then uses these arrays to create a new array with duplicates removed.

**Options Compared**

The benchmark tests two options:

1. **Lodash's `uniq` function**: This function takes an array as input and returns a new array with duplicate elements removed.
2. **Built-in `Set` data structure in JavaScript**: This data structure allows you to store unique values and can be used to remove duplicates from an array by converting it to a set and then back to an array.

**Pros and Cons**

### Lodash's `uniq`

Pros:

* Well-tested and stable function
* Supports various input types, including arrays, objects, and more
* Can handle edge cases, such as duplicate elements with different values

Cons:

* Requires an additional library (Lodash) to be included in the test environment
* May have a higher overhead due to the need for the library and its dependencies

### Built-in `Set` data structure

Pros:

* Native to JavaScript, eliminating the need for external libraries
* Fast and efficient, as it leverages the browser's optimized storage and lookup mechanisms

Cons:

* Can be slower than Lodash's `uniq` function due to the overhead of creating a new set and then converting it back to an array
* May not handle edge cases as well as Lodash's `uniq`

**Other Considerations**

When choosing between these two approaches, consider the following factors:

* **Performance**: If speed is critical, using the built-in `Set` data structure may be a better choice. However, if stability and reliability are more important than raw performance, Lodash's `uniq` function might be a better fit.
* **Libraries and dependencies**: If you're concerned about including additional libraries in your test environment, the built-in `Set` data structure is a better option.

**Special JS Feature or Syntax**

There is no special JavaScript feature or syntax used in this benchmark. The focus is on comparing two existing approaches to remove duplicates from an array.

Now that we've explored the benchmark, let's take a look at some alternative approaches:

* **Other array manipulation functions**: There are other functions available for removing duplicates from an array, such as `Array.prototype.filter()`, `Array.prototype.forEach()`, or `Array.prototype.reduce()`. These approaches might be worth considering in future benchmarks.
* **Alternative data structures**: Other data structures, like `Map` or `PriorityQueue`, might offer different performance characteristics for removing duplicates. Investigating these alternatives could provide valuable insights into the trade-offs involved.

I hope this explanation has been helpful!

Related benchmarks:

Lodash Uniq vs Javascript Set #2 (version: 0)

Comparing performance of: Lodash Uniq vs Javascript Set

Created: 5 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):