Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

Benchmark Overview

The provided benchmark measures the execution speed of different jQuery versions (1.9.1, 1.11.3, and 3.5.1) in a specific test case.

Test Case

The test case is a simple HTML page that uses jQuery to manipulate an unordered list (<ul>) element. The script preparation code defines a function tests that takes a jQuery object as an argument. Within this function:

• It selects the third element of the list using .menu-item.eq(2) and sets its closest parent's background color to red.
• Then, it sets the parent element's border to 1px solid blue.
• Finally, it removes all elements from the page.

The test case is executed three times with different jQuery versions: 1.9.1, 1.11.3, and 3.5.1. Each execution is wrapped in a $.noConflict(true) function to ensure that only one instance of jQuery is used per execution.

Options Compared

In this benchmark, we have three main options being compared:

1. jQuery Version 1.9.1
2. jQuery Version 1.11.3
3. jQuery Version 3.5.1

Each option has its pros and cons:

• Pros of each version:
  • jQuery Version 1.9.1: This is an older version, but it might be faster in terms of execution speed due to its smaller size.
  • jQuery Version 1.11.3: This version has some additional features and improvements compared to the previous ones, which might affect performance.
  • jQuery Version 3.5.1: This is a more recent version with significant changes, including improved performance and new features.
• Cons of each version:
  • jQuery Version 1.9.1: Its smaller size might not be enough to compensate for slower execution speeds.
  • jQuery Version 1.11.3: Although it has some improvements, it might also introduce additional overhead that slows down the execution speed.
  • jQuery Version 3.5.1: Its larger size and new features might increase the execution time.

Library and Purpose

The $.noConflict(true) function is used to prevent conflicts between different versions of jQuery in the same document. This function returns a new version of jQuery that does not interfere with the original one, ensuring that only one instance of jQuery is used per execution.

Special JS Feature or Syntax (None)

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

Alternatives

If you want to create similar benchmarks on MeasureThat.net, here's what you can do:

1. Create a new benchmark definition by filling out the required fields.
2. Write your own test case script using jQuery and execute it with different versions (if necessary).
3. Use the $.noConflict(true) function if needed to prevent conflicts between different versions of jQuery.
4. Publish your benchmark result on MeasureThat.net for others to compare.

By creating custom benchmarks, you can help improve the accuracy of JavaScript microbenchmarking results and contribute to the understanding of performance differences between various JavaScript versions and libraries.