I wrote that program in the hope that it would better illustrate why some of the benchmarks on the site aren't very good since for some benchmarks the program performance is highly dependent on the libraries being used and not the programming language implementation itself. I know at least one person opened an issue regarding this on the site issue tracker at https://salsa.debian.org/benchmarksgame-team/benchmarksgame/... and I also believe I recall one of the Rust regex crate developers mentioning this too.

I know that using PCRE2 in a Python program isn't typical but the Benchmarks Game does allow using other libraries and many of the previously submitted programs have been doing this for a long time already. The pidigits benchmark is the other benchmark that is heavily dependent on the libraries being used as is illustrated by their being a nearly ten way tie for second place by a bunch of programs that all use GMP.