Definitely use Devel::NYTProf.

The perl documentation also contains a section about this topic that should be read. See https://perldoc.perl.org/perlperf.html. The documentation for Devel::NYTProf gives more details about how to use it specifically.

An internet search will produce plenty of examples, but one that includes example output is at https://www.effectiveperlprogramming.com/2011/10/profile-with-develnytprof.