Slow is in the eye of the beholder. Sure, for some applications, Perl blows Raku out of the water. Add in some Moose, and the situation is not so different. YMMV.

On my 4-core i7 Macbook Pro parsing a 20Mb log file with a regex takes 9.4 times longer with Raku than Perl5. That's unacceptable. Adding Moose to Perl5 reduces the differential to 7.1 which is still huge.

Do you have a gist of your code and a representative sample of the log file you're parsing?

It's a one-liner:

    for 'logs1.txt'.IO.lines -> $_ { .say if $_ ~~ /<<\w ** 15>>/; }