Benchmark: Intersection filter vs lodash intersection

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var arr1 = [1, 2, 3, 4, 5, 6, 7, 8, 9]
var arr2 = [1, 2, 3, 4];

Tests:

filter
const result = arr1.filter(el => arr2.includes(el))
lodash intersection
_.intersection(arr1, arr2)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
filter
lodash intersection

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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's being tested, compared, and considered in this JavaScript microbenchmark.

**Benchmark Definition**

The benchmark is comparing two approaches to find the intersection of two arrays: `filter` (using native JavaScript) and `_.intersection` from the Lodash library. The test case definition provides a script preparation code that creates two arrays, `arr1` and `arr2`, with some common elements.

**Options Compared**

The benchmark is comparing:

1. Native JavaScript's `filter` method: This approach uses a callback function to iterate over each element in `arr1` and checks if it exists in `arr2`. If an element is found, it's included in the result.
2. Lodash's `_.intersection` method: This approach takes two arrays as input and returns an array containing only the elements that are present in both arrays.

**Pros and Cons**

* Native JavaScript's `filter` method:
	+ Pros:
		- Simple to implement and understand.
		- Can be optimized for performance by using techniques like caching or memoization.
	+ Cons:
		- May not be as efficient as Lodash's implementation, especially for large arrays.
		- Requires manual management of iteration and element existence checks.
* Lodash's `_.intersection` method:
	+ Pros:
		- Optimized for performance by leveraging the underlying JavaScript data structures (arrays).
		- Reduces the need for manual iteration and element existence checks.
	+ Cons:
		- May add unnecessary overhead due to the use of a separate library.
		- Requires an external dependency, which may not be desirable in all cases.

**Lodash Library**

The `_.intersection` method is part of the Lodash library, which provides a collection of utility functions for JavaScript. The purpose of Lodash is to provide a set of reusable and efficient functions that can help developers simplify their code and improve performance.

**Special JS Feature or Syntax (None)**

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

**Other Considerations**

When choosing between native JavaScript's `filter` method and Lodash's `_.intersection` method, consider the following factors:

* Performance: If performance is critical, Lodash's implementation may be faster due to its optimized internal workings.
* Code complexity: Native JavaScript's `filter` method can be more straightforward to understand and implement, while Lodash's `_.intersection` method requires an external dependency and may add complexity.
* Dependency management: The choice of library can impact the size and complexity of the project. If you prefer not to use external libraries, native JavaScript's approach may be a better fit.

**Other Alternatives**

If you're interested in exploring alternative approaches for finding the intersection of two arrays, consider:

* Using `Array.prototype.some()` or `Array.prototype.every()` instead of `filter`.
* Leveraging modern JavaScript features like `Array.prototype.findIndex()` and `Array.prototype.includes()`.
* Employing iterative techniques with loops and conditional statements.
* Utilizing third-party libraries like `moment.js` for date-based intersections (not applicable in this case).

Keep in mind that the choice of approach ultimately depends on your specific use case, performance requirements, and personal preference.

Related benchmarks:

Intersection filter vs lodash intersection (version: 0)

Comparing performance of: filter vs lodash intersection

Created: 6 years ago by: Guest

Jump to the latest result

filter

lodash intersection

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):