Resource on debugging, profiling and benchmarking in Perl
I am listing some of the online resource which really helped me to understand the debugging and profiling in Perl.
Profiling Perl by Simon Cozens
Dr. Dobbs Journel by brian d foy
Wasting time thinking about wasted time by brian d foy
Randal L. Schwartz column on Unix Review
Benchmarking your code by turnstep
Debugging and Profiling mod_perl Applications by Frank Wiles
also do not forget to check chapter 4, 5, 6 of Mastering Perl Book and documentation on CPAN and perldoc.
Any Addition to this list is welcome.
Slides of Tim Bunce talk on Devel::NYTProf YAPC::EU August 2010