Benchmark: uniq vs new Set - MeasureThat.net

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<=100000; 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 benchmark and explore what's being tested.

**Benchmark Definition**

The provided JSON represents a JavaScript microbenchmark that compares two approaches to remove duplicates from an array:

1. `_.uniq(arrayToDedup)` using Lodash
2. `[...new Set(arrayToDedup)]` using JavaScript built-in `Set`

**Options Compared**

Two options are being compared:

* **Lodash's `uniq()` method**: This function takes an array as input and returns a new array with duplicate elements removed.
* **JavaScript's spread operator (`[...]`) used with `new Set()```**: This approach creates a new `Set` from the input array, which automatically removes duplicates. The resulting set is then spread back into an array.

**Pros and Cons of Each Approach**

1. **Lodash's `uniq()` method**:
	* Pros:
		+ Fast and efficient (optimized for performance)
		+ Provides a simple and intuitive API
	* Cons:
		+ Requires Lodash library to be included, which might add extra overhead
2. **JavaScript's spread operator with `new Set()`**:
	* Pros:
		+ No external dependencies required
		+ Fast and efficient (optimized for performance)
		+ Easy to understand and implement
	* Cons:
		+ Might require additional memory allocation due to the intermediate set creation

**Library and Its Purpose**

In this benchmark, Lodash is used as a library to provide the `uniq()` method. Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks like data manipulation, string manipulation, and more.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntaxes being used in this benchmark. The code is standard JavaScript.

**Other Alternatives**

If you were to implement this benchmark without using Lodash, other alternatives for removing duplicates from an array could include:

* Using `Array.prototype.filter()` method
* Implementing a custom loop-based approach to remove duplicates
* Utilizing libraries like `lodash-es` (a smaller and more modern alternative to Lodash)
* Leveraging built-in methods like `Map` or `Reduce`

These alternatives would require additional code and potentially different implementation details, but they are all viable options for removing duplicates from an array in JavaScript.

Related benchmarks:

uniq vs new Set (version: 0)

uniq vs new Set

Comparing performance of: Lodash Uniq vs Javascript Set

Created: 7 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):