Benchmark: lodash uniq vs set arossert

HTML Preparation code:

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

Tests:

Set
var l = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return new Set(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
Array

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Set	5602410.5 Ops/sec
Array	9182769.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what is being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark definition provides two test cases:

1. `Set`: This test case creates an array `[1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]` and then returns a new `Set` object from it.
2. `Array`: This test case creates the same array as above and then uses the `_.uniq()` function from Lodash to remove duplicates.

**Options Compared**

The two options being compared are:

1. **Array**: Using an array and removing duplicates using `_.uniq()`
2. **Set**: Creating a new `Set` object directly from the array

**Pros and Cons of Each Approach**

* **Array with _.uniq()**
	+ Pros:
		- This approach is likely to be more efficient since it uses a built-in function that knows how to optimize for this specific use case.
		- It's also possible that Lodash's implementation is optimized for this particular use case, making it faster than creating an array and then removing duplicates manually.
	+ Cons:
		- This approach requires Lodash to be included in the benchmark, which may add extra overhead.
		- The optimization techniques used by _.uniq() might not be directly applicable to a simple `Set` creation.
* **Set**
	+ Pros:
		- Creating a new `Set` object is a more straightforward and efficient approach since it uses the built-in JavaScript API.
		- It's possible that modern browsers are optimized for creating sets, making this approach faster than using an array with _.uniq().
	+ Cons:
		- This approach might be slower if the browser is not optimized for set creation or if there are additional overheads (e.g., due to security restrictions).

**Library: Lodash**

Lodash is a popular JavaScript library that provides a wide range of functions, including `_.uniq()`. The library's purpose is to provide a collection of high-quality, useful functions that can be used in a variety of contexts. In this benchmark, Lodash is used to remove duplicates from the array.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntaxes mentioned in this benchmark definition. However, it's worth noting that the use of `Set` objects and the `.uniq()` function might rely on some specific browser implementations or security restrictions. In such cases, the behavior might be different across browsers.

**Other Alternatives**

If you wanted to compare an alternative approach, here are a few options:

* Using a custom implementation for removing duplicates (e.g., using `forEach` and `push`)
* Using a library like `fast-set` or `set-objects` instead of Lodash's `_.uniq()`
* Comparing the performance of different array data structures (e.g., `ArrayBuffer`, `TypedArray`)

Related benchmarks:

lodash uniq vs set arossert (version: 0)

Comparing performance of: Set vs Array

Created: 2 years ago by: Guest

Jump to the latest result

Set

Array

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):