I’ve uploaded the screencast of my NYTProf talk at the London Perl Workshop in November 2008.
It’s based on a not-quite-2.08 version and includes some coverage of an early draft of the ‘timings per rolled-up package name’ feature I discussed previously.
It also shows how and why anonymous subroutines, defined at the same line of different executions of the same string eval, get ‘merged’.
The demos use perlcritic and Moose code. It also includes a nice demonstration showing NYTProf highlighting a performance problem with File::Spec::Unix when called using Path::Class::Dir objects.
It’s 36 minutes long, including a good Q&A session at the end (wherein a market rate for performance improvements is established). Enjoy.