String parsing - Perl5's forte - is still dog slow with Perl6/Raku and year after year we hear that will change in the future. Don't hold your breath.
Look at how easily raku binds to a python charting module in this article: https://www.perl.com/article/plotting-with-perl-6/
for 'logs1.txt'.IO.lines -> $_ { .say if $_ ~~ /<<\w ** 15>>/; }