The benchmark described compares the performance of two different methods for deleting the query parameter start_radio from a URL.

Methods Compared

1. Using the URL Constructor and searchParams.delete:

   • Implementation:

     for(let i=loop_n;--i;){
         new URL(urls[i].href).searchParams.delete("start_radio");
     }
     

   • Description: This method creates a new URL object for each URL string and utilizes the built-in searchParams API to remove the start_radio parameter.

2. Using Regular Expressions with String.replace:

   • Implementation:

     for(let i=loop_n;--i;){
         const regex = new RegExp('[?|&]start_radio=\\d', '');
         urls[i].href.replace(regex, '');
     }
     

   • Description: This method constructs a Regular Expression to identify the start_radio parameter in the query string and replaces it with an empty string to effectively remove it.

Performance Results

• The benchmark results show the following executions per second:
  • Deletion with RegExp and replace: Approximately 3467.14 executions/sec.
  • Deletion with Url constructor and searchParams.delete: Approximately 143.46 executions/sec.

Pros and Cons of Each Approach

1. URL Constructor and searchParams.delete:

   • Pros:
     • Readability: This method is more understandable, especially for those familiar with the URL API.
     • Safety: The URL constructor correctly parses the URL, ensuring the integrity of the URL format and handling edge cases.
   • Cons:
     • Performance: The creation of a new URL object for each iteration introduces performance overhead, making it slower in comparisons, particularly with numerous URLs.

2. Regular Expressions with String.replace:

   • Pros:
     • Performance: This method shows high performance in the benchmark as string operations with RegExp are generally faster than creating objects.
     • Flexibility: Regular Expressions can be tailored to match various formats and might permit more complex matching conditions.
   • Cons:
     • Complexity: Regular expressions can be more difficult to read and understand, especially for developers less familiar with them. Improper regex can lead to unintentional matches or bugs.
     • Edge Cases: This method risks failing on malformed URLs or if the query parameter is absent.

Other Considerations

• The URL interface and searchParams API are modern JavaScript features that adhere to the URL specification, and they provide a clean, structured way to deal with URLs.
• The approach using Regular Expressions might not handle all possible edge cases effectively, especially with malformed or intricately structured URLs. It may require rigorous testing to ensure all scenarios are covered.

Alternatives

• Using URLSearchParams Directly: Instead of creating a new URL object each time, you could extract the query string and manipulate it using the URLSearchParams API directly to enhance performance while avoiding the overhead of creating URL objects.
• String Manipulation: If performance is critical, consider manually manipulating strings without regex to achieve even faster implementations for specific, fixed patterns.
• Third-party Libraries: Libraries such as query-string or qs can provide utility functions to manipulate query strings flexibly and safely, with potentially better performance in batch scenarios.

In conclusion, the choice between these methods should consider the trade-offs between performance and code clarity, especially given the context in which they'll be used.