Benchmark: _.difference vs Set 2

HTML Preparation code:

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

Script Preparation code:

var longArray = []
for (let i = 0; i < 1000; i++) {
  longArray.push(i)
}
longArray = _.shuffle(longArray)

var shortArray = []
for (let i = 500; i < 1001; i++) {
  shortArray.push(i)
}
shortArray = _.shuffle(shortArray)

Tests:

lodash
_.difference(shortArray, longArray)
Set
var set = new Set(longArray) shortArray.some(i => !set.has(i))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash
Set

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 its test cases.

**Benchmark Overview**

The benchmark is designed to compare the performance of two approaches: using Lodash's `difference` function and using a built-in JavaScript `Set` object.

**Test Case 1: Lodash's `difference` Function**

* The script preparation code creates two arrays, `longArray` and `shortArray`, with different lengths.
* `longArray` is shuffled to randomize its elements, while `shortArray` is not.
* The benchmark definition calls the `difference` function from Lodash, passing in `shortArray` as the first argument and `longArray` as the second.

**Pros and Cons of Using Lodash's `difference` Function:**

Pros:

* Convenient and concise syntax
* Reduces boilerplate code

Cons:

* May have performance overhead due to the complexity of the function implementation
* May not be optimized for specific use cases or array sizes

**Test Case 2: Built-in JavaScript `Set` Object**

* The script preparation code creates two arrays, `longArray` and `shortArray`, with different lengths.
* `longArray` is shuffled to randomize its elements, while `shortArray` is not.
* The benchmark definition uses a new `Set` object created from `longArray`, then checks if each element of `shortArray` is present in the set using the `has` method.

Pros:

* Lightweight and efficient, as it leverages the optimized implementation of the JavaScript engine
* Can be more performant for large array sizes or complex operations

Cons:

* Requires manual looping and conditional statements, making the code less concise
* May have a steeper learning curve due to the unfamiliar syntax

**Library: Lodash**

Lodash is a popular JavaScript library that provides a wide range of utility functions. The `difference` function is one such utility function that calculates the difference between two arrays.

The inclusion of Lodash in the benchmark allows developers to test its performance and efficiency, as well as compare it to other approaches.

**Special JS Feature: None**

There are no special JavaScript features or syntaxes used in this benchmark. The focus is on comparing the performance of two different approaches using standard JavaScript constructs.

**Other Alternatives:**

* Other array manipulation functions available in Lodash (e.g., `intersection`, `union`, etc.)
* Custom implementation of the `difference` function
* Using other libraries or frameworks that provide similar functionality (e.g., Ramda, Jest, etc.)

Overall, this benchmark provides a good starting point for comparing the performance of Lodash's `difference` function and the built-in JavaScript `Set` object. By testing both approaches, developers can gain insights into the efficiency and effectiveness of each method for specific use cases.

Related benchmarks:

_.difference vs Set 2 (version: 0)

Comparing performance of: lodash vs Set

Created: 6 years ago by: Guest

Jump to the latest result

lodash

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):