Let's break down the provided benchmark definition and test cases.

Benchmark Definition

The benchmark is testing the performance of the includes() function in JavaScript, specifically comparing its performance when used with arrays versus strings.

Script Preparation Code

There is no script preparation code provided, which means that the script to be tested will be generated automatically by MeasureThat.net based on the benchmark definition.

Html Preparation Code

Similarly, there is no html preparation code provided, indicating that the HTML to be executed alongside the JavaScript script will also be generated automatically.

Individual Test Cases

There are two test cases:

1. test includes on array: This test case defines a constant b using an array and checks if the element 'InQueue' is present in it.

const b = ['Draft', 'Launcher' , 'InQueue', 'PartlySettled'].includes('InQueue');

2. test includes on string: This test case defines a constant b using a string with pipes (|) separating the values and checks if the element 'InQueue' is present in it.

const b = 'Draft|Launcher|InQueue|PartlySettled'.includes('InQueue');

Pros and Cons of Different Approaches

The two approaches tested here are:

• Array-based includes(): This approach uses the includes() function with an array as its argument.
• String-based includes() with pipes: This approach uses the includes() function with a string containing pipes separating the values.

Pros and Cons:

• Array-based includes():
  • Pros:
    • More efficient for large arrays, since includes() only scans the array until it finds the match.
    • Can be faster for certain use cases, such as when searching for an element in a sorted array.
  • Cons:
    • May not perform well if the array is very large or contains many duplicates, since includes() still needs to scan the entire array.
• String-based includes() with pipes:
  • Pros:
    • More efficient than using the split() function to create an array of values and then use includes().
  • Cons:
    • Requires a string that is specially formatted, which may be less readable or maintainable for some developers.
    • Can still perform poorly if the string is very large or contains many duplicates.

Library

None of the test cases uses any external libraries. The JavaScript built-in includes() function is used in both test cases.

Special JS Features or Syntax

None of the test cases use any special JavaScript features or syntax that are not commonly supported by most browsers.

Other Alternatives

If you want to explore alternative approaches, here are a few options:

• Using findIndex() instead of includes(): This can be faster for certain use cases, since it returns the index of the first match, rather than just whether there is a match.
• Using regular expressions: Regular expressions can provide more flexibility and power when searching for patterns in strings, but may also introduce additional overhead.

In conclusion, the benchmark provided by MeasureThat.net is testing the performance of two different approaches to using the includes() function in JavaScript: one with arrays and one with strings. The results will help developers understand which approach is faster and more efficient for their specific use cases.