I'll break down the provided benchmark and explain what's being tested, compared options, pros and cons of each approach, library usage, special JS features or syntax, and alternative approaches.

Benchmark Overview

The benchmark tests three different approaches to deleting multiple values from an array in JavaScript:

1. Using splice()
2. Using delete operator followed by Object.values() to create a new array
3. Using Array.prototype.filter() with the includes() method

Each test case has a unique name, and their respective benchmark definition scripts are provided.

Options Compared

The three options being compared are:

1. splice(): A built-in JavaScript method that modifies the original array by removing elements at specified indices.
2. delete + Object.values(): Using the delete operator to remove individual elements from the array, and then using Object.values() to create a new array with the remaining elements.
3. filter() with includes(): Using the includes() method to check if an index exists in the deleteIndexes array before including it in the filtered array.

Pros and Cons of Each Approach

1. splice():
   • Pros: Efficient, fast, and straightforward.
   • Cons: Modifies the original array, which may be undesirable depending on the use case.
2. delete + Object.values():
   • Pros: Creates a new array with remaining elements, preserving the original array's integrity.
   • Cons: May be slower due to the overhead of creating a new array using Object.values() and potentially slower delete operations.
3. filter() with includes():
   • Pros: Preserves the original array's integrity like delete + Object.values(), but with a simpler syntax.
   • Cons: May be slower than splice() due to the overhead of calling includes() for each index.

Library Usage

None of the benchmarked scripts use any external libraries.

Special JS Features or Syntax

The benchmark uses two special features:

1. Template literals: Used in the Script Preparation Code and Individual test cases sections.
2. Array.from(): Used to create an array from an iterable (in this case, another array).

Note that these are not critical features, as they are part of the JavaScript language.

Alternative Approaches

Some alternative approaches to deleting multiple values from an array include:

1. Using map() and slicing: Create a new array with only the desired elements using map(), and then slice it to remove unnecessary elements.
2. Using reduce() and filtering: Use reduce() to iterate over the original array, applying a filter function to each element.
3. Using forEach() and splicing: Use forEach() to iterate over the original array, modifying it in place using splice().
4. Using set: If you're using modern JavaScript (ES6+), you can use Set data structure to remove duplicates from an array.

Each of these approaches has its own trade-offs and may be more or less suitable depending on your specific use case.