Let's break down the benchmark and explain what's being tested.

Benchmark Overview

The benchmark compares three methods for checking if a string exists within an array:

1. array.indexOf('sausage') !== -1
2. array.includes('sausage')
3. _.includes(array, 'sausage') (using the Lodash library)

Options Being Compared

Here's what each option is doing:

• Option 1: indexOf method
  • This method returns the index of the first occurrence of the specified value ('sausage') in the array. If the value is not found, it returns -1.
  • Pros: simple and widely supported.
  • Cons: can be slower than other options, especially for large arrays, since it has to iterate through the entire array to find a match.
• Option 2: includes method
  • This method returns a boolean indicating whether the specified value ('sausage') exists in the array.
  • Pros: more concise and readable than indexOf, and can be faster for large arrays since it uses a optimized implementation.
  • Cons: not all browsers support this method, so it may not work in older or less modern environments.
• Option 3: _.includes method (using Lodash)
  • This method returns a boolean indicating whether the specified value ('sausage') exists in the array.
  • Pros: highly optimized and widely supported, thanks to its use of native methods and ES6 features.
  • Cons: requires including the Lodash library, which may add overhead for some users.

Library Used

The _.includes method is using the Lodash library, which provides a comprehensive set of utility functions for JavaScript. Lodash is widely used in web development and is known for its performance and reliability.

Special JS Feature or Syntax

There are no special JavaScript features or syntaxes being tested in this benchmark. The focus is on comparing three well-established methods for string existence checks.

Other Alternatives

If you're interested in exploring alternative approaches, here are a few options:

• Array.prototype.find: This method returns the first element of the array that satisfies the provided testing function.
• **String.indexOf() + Array.includes(): This approach combines theindexOfmethod on strings with theincludes` method on arrays. While it may seem like an obvious combination, it's not always the most efficient or readable solution.
• For loop: You could also use a simple for loop to iterate through the array and check each element individually. However, this approach would likely be slower than using the built-in methods provided by modern JavaScript engines.

Overall, the benchmark is providing valuable insights into the performance characteristics of different string existence checks in modern web browsers. By comparing three well-established methods, it's helping users understand the trade-offs between readability, maintainability, and raw performance.