How has support for qr// precompiled regex changed across recent Perl versions?

Support for the `qr//` precompiled regex in Perl has evolved over various versions, focusing on performance enhancements and additional features. Initially introduced in Perl 5.004, the `qr//` operator allows for defining regex patterns that can be reused multiple times without the need to compile them repeatedly. This greatly improves efficiency, especially when working with complex patterns.

In more recent versions, like Perl 5.10 and onward, enhancements have included support for new regex features, including the ability to use named captures, the /p and /g modifiers, and improvements in performance due to internal optimizations. Additionally, the introduction of "regex code" in Perl 5.14 allowed for inline regex options, further enhancing the power and flexibility of precompiled regex.

As of Perl 5.32, the handling of `qr//` has become more robust, with better error messages and support for Unicode properties, which allows for more complex and internationalized regex patterns. The ongoing updates continue to make precompiled regex a valuable tool for Perl developers.