Benchmark: lodash.uniq vs array.filter

Tests:

array
var l = [1,1,1,1,2,2,2,3,3,3,4,4,4,5,5] return l.filter((value, index, self) => self.indexOf(value) === index);
lodash
var l = [1,1,1,1,2,2,2,3,3,3,4,4,4,5,5]; return _.uniq(l);

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Test case name	Result
array
lodash

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Slowest: N/A

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

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Let's break down what is tested in the provided JSON benchmark.

**Benchmark Description**

The benchmark compares two approaches to remove duplicates from an array: `Array.prototype.filter()` and Lodash's `uniq()` function. The goal is to measure which approach is faster for this specific use case.

**Options Compared**

1. **Array.prototype.filter()**: This method creates a new array with all elements that pass the test implemented by the provided function.
2. **Lodash's uniq() function**: This function returns an array of unique values, preserving order.

**Pros and Cons of Each Approach**

* **Array.prototype.filter()**:
	+ Pros:
		- Widely supported and well-documented in most browsers and JavaScript engines.
		- Can be used with other filtering methods.
	+ Cons:
		- Creates a new array, which can lead to performance issues for large datasets.
		- Requires iterating over the original array and checking if each element is present in its own index.
* **Lodash's uniq() function**:
	+ Pros:
		- Optimized for performance, especially when dealing with large arrays.
		- Preserves the original order of elements.
	+ Cons:
		- Requires Lodash to be included as a dependency (library).
		- Not widely supported in older browsers or JavaScript engines.

**Library: Lodash**

Lodash is a popular utility library for JavaScript that provides various functions for tasks such as array manipulation, string manipulation, and more. The `uniq()` function is one of its most useful features, allowing developers to easily remove duplicates from arrays while preserving order.

**Other Considerations**

When choosing between these approaches, consider the trade-offs between performance, code size, and maintainability. If you need to support older browsers or JavaScript engines, using `Array.prototype.filter()` might be a better choice. However, if you're targeting modern browsers and prioritize performance, Lodash's `uniq()` function could be a good option.

**Alternative Approaches**

Other approaches to remove duplicates from an array include:

* Using a Set data structure (not supported in older browsers)
* Implementing a custom loop to check for duplicates
* Using a library like Underscore.js (similar to Lodash)

Keep in mind that the choice of approach depends on the specific requirements and constraints of your project.

Related benchmarks:

lodash.uniq vs array.filter (version: 0)

Comparing performance of: array vs lodash

Created: 4 years ago by: Guest

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array

lodash

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):