Benchmark: set vs lodash uniq vs custom unique 2

HTML Preparation code:

<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js'></script>

Script Preparation code:

function unique(
  array,
  equals = Object.is,
) {
  const result = array.filter(
    (item, index, array) => array.findIndex((a) => equals(a, item)) === index,
  );
  return result.length === array.length ? array : result;
}

Tests:

Set
const l = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return new Set(l);
Lodash uniq
const l = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return _.uniq(l);
Custom unique
const l = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return unique(l);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Set
Lodash uniq
Custom unique

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser/OS: Chrome 130 on Linux

View result in a separate tab

Lodash uniq

6.6M/s

Custom unique

4.5M/s

Set

4.4M/s

View exact numbers

Test name	Executions per second
✓ Lodash uniq	6,632,406 Ops/sec
Custom unique	4,498,624 Ops/sec
Set	4,358,537 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Overview**

The provided benchmark compares three approaches to remove duplicates from an array: using the built-in `Set` object, Lodash's `uniq` function, and a custom implementation called `unique`.

**Options Compared**

1. **Built-in Set Object**: This approach uses the `Set` object to remove duplicates from the array.
2. **Lodash uniq**: This approach uses Lodash's `uniq` function, which is a utility function for removing duplicates from an array.
3. **Custom Unique Function**: This approach defines a custom `unique` function using JavaScript's `filter` method and the `findIndex` method.

**Pros and Cons**

1. **Built-in Set Object**:
	* Pros: Fast and efficient, as it uses a hash table to store unique elements.
	* Cons: May not work well with non-numeric or non-string values, and may have performance issues with very large datasets.
2. **Lodash uniq**:
	* Pros: Robust and feature-rich, with support for various types of duplicates (e.g., array vs. object).
	* Cons: Adds an external dependency (Lodash), which may increase load times or bundle sizes.
3. **Custom Unique Function**:
	* Pros: Customizable and flexible, allowing developers to optimize performance or handle specific edge cases.
	* Cons: May have higher overhead due to the custom implementation, potentially affecting performance.

**Library and Features**

1. **Lodash uniq**: Lodash is a popular utility library for JavaScript that provides a wide range of functions for data manipulation, including `uniq`.
2. **Set Object**: The built-in Set object in JavaScript is used to store unique values, making it an efficient choice for removing duplicates.

**Special JS Features or Syntax**

None are mentioned in the benchmark definition or individual test cases.

**Other Alternatives**

1. **Array.prototype.filter()**: This method can be used to remove duplicates from an array using a custom implementation.
2. **Reduce() and Array.prototype.indexOf()**: Another approach to removing duplicates could involve using `reduce()` to iterate over the array and `indexOf()` to check for duplicate values.

In summary, the benchmark compares three approaches to remove duplicates from an array: using the built-in Set object, Lodash's uniq function, and a custom implementation. Each approach has its pros and cons, and understanding these differences can help developers choose the best solution for their specific use case.

set vs lodash uniq vs custom unique 2 (version: 1)

Comparing performance of: `Set vs Lodash uniq vs Custom unique`

Created: one year ago by: Registered User

Go to the latest result

Set

Lodash uniq

Custom unique

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

set vs lodash uniq vs custom unique 2 (version: 1)

Comparing performance of: Set vs Lodash uniq vs Custom unique

Created: one year ago by: Registered User

Go to the latest result

Set

Lodash uniq

Custom unique

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `Set vs Lodash uniq vs Custom unique`