Benchmark: Lodash Difference vs Set.delete

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/lodash/4.17.0/lodash.min.js"></script>

Script Preparation code:

var arr1=[]; 
var i;
for(i=0; i<1000000; i++){
	arr1.push(i);
}

var arr2=[]; 
for(i=0; i<1000000; i++){
	arr2.push(1000000-i);
}

Tests:

Lodash Difference
_.difference(arr1,arr2)
Set.delete()
const set1 = new Set(arr1); arr2.forEach(v => set1.delete(v))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash Difference
Set.delete()

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 benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark compares two approaches to find the difference between two arrays:

1. Using Lodash library (`_.difference(arr1, arr2)`).
2. Using JavaScript's built-in `Set` data structure and its `delete()` method.

**Lodash `.difference()` Method**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks like array manipulation, string processing, and more. The `.difference()` function returns a new array containing only the elements that are present in the first array (`arr1`) but not in the second array (`arr2`).

**JavaScript's `Set` data structure**

In JavaScript, `Set` is a collection of unique values. It allows you to store and manipulate collections of values efficiently. The `delete()` method removes an element from the set.

**Test Case Comparison**

The two test cases compare the performance of these two approaches:

1. **Lodash `.difference()` Method**: This test case measures the execution time of the Lodash function.
2. **JavaScript's `Set` data structure and `delete()` method**: This test case measures the execution time of creating a set from the first array (`arr1`) and then deleting elements from it using the `delete()` method, while iterating over the second array (`arr2`).

**Pros and Cons**

Here are some pros and cons of each approach:

* **Lodash `.difference()` Method**: Pros:
	+ Simple to use.
	+ Provides a clear and efficient way to find differences between two arrays.
* Cons:
	+ Requires an additional library (Lodash).
	+ May have overhead due to function call and object creation.
* **JavaScript's `Set` data structure and `delete()` method**:
	+ Pros:
		- Lightweight and doesn't require an external library.
		- Allows for efficient element removal from the set.
	+ Cons:
		- Requires manual implementation, which can be error-prone.
		- May have performance overhead due to set creation and iteration.

**Other Considerations**

* **Array creation**: Both approaches create a new array or set. However, Lodash's `.difference()` method may have additional overhead due to object creation and function call.
* **Element removal**: The JavaScript approach using `Set` data structure has an advantage when it comes to removing elements from the original arrays, as sets can be used to keep track of unique values.

**Library Usage**

In this benchmark, Lodash is used in the test case for the `.difference()` method. The library provides a simple and efficient way to find differences between two arrays.

**Special JS Features/Syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark.

Related benchmarks:

Lodash Difference vs Set.delete (version: 0)

Comparing performance of: Lodash Difference vs Set.delete()

Created: 6 years ago by: Guest

Jump to the latest result

Lodash Difference

Set.delete()

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):