Benchmark: Uniq vs Set lookup

HTML Preparation code:

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

Tests:

Set
var l = new Set([1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]); return 6 in l;
Uniq
var l = _.uniq([1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]); return l.includes(6);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Set
Uniq

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its test cases.

**Benchmark Definition**

The benchmark definition is a JSON object that describes the benchmark to be run. In this case, there are two test cases:

1. "Uniq vs Set lookup" - This is the name of the benchmark.
2. The script preparation code is empty, which means no setup or teardown code is required before running the benchmark.
3. The HTML preparation code includes a script tag that loads the Lodash library (version 4.17.10) from a CDN.

**Individual Test Cases**

There are two test cases:

1. **Set**: This test case uses JavaScript's built-in `Set` data structure to create an array with duplicates (seven 7s). The benchmark definition is:
```javascript
var l = new Set([1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]);\r\nreturn 6 in l;
```
This test case checks if the element `6` is present in the set.

2. **Uniq**: This test case uses Lodash's `uniq` function to create an array with duplicates (seven 7s). The benchmark definition is:
```javascript
var l = _.uniq([1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]);\r\nreturn l.includes(6);
```
This test case checks if the element `6` is present in the array returned by `uniq`.

**Options Compared**

The two test cases compare the performance of using a built-in JavaScript data structure (`Set`) versus using an external library function (`uniq` from Lodash).

**Pros and Cons**

* **Built-in `Set`**: Pros:
	+ Faster execution, as it's a native data structure.
	+ More efficient memory usage, as it uses a hash table internally.
	+ Easier to implement and understand for developers familiar with JavaScript.
* Cons:
	+ May not be as robust or feature-rich as the Lodash implementation.
* **Lodash `uniq`**: Pros:
	+ More comprehensive and robust than the built-in `Set`.
	+ Provides additional features, such as handling null or undefined values.
	+ Can be used in more complex scenarios where a simple set is not enough.
* Cons:
	+ Slower execution, due to the overhead of loading the Lodash library and executing the `uniq` function.
	+ Larger memory usage, due to the additional library dependencies.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks like data manipulation, array operations, and more. The `uniq` function is one of these utilities, which removes duplicate elements from an array while preserving order.

**Special JS Feature or Syntax: None**

There are no special JavaScript features or syntax used in this benchmark.

**Other Alternatives**

If you wanted to compare the performance of using a different data structure or library function, some alternatives could be:

* Using `Array.prototype.filter()` and `Array.prototype.includes()`
* Using `Map` instead of `Set`
* Implementing a custom `uniq` function without relying on Lodash

However, these alternatives would likely require significant changes to the benchmark definition and test cases.

Related benchmarks:

Uniq vs Set lookup (version: 0)

Comparing performance of: Set vs Uniq

Created: 2 years ago by: Guest

Jump to the latest result

Set

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):