I've uploaded presentation I need to give to London.pm about Turbo-Charged Test Suites. Regrettably, having been running around Europe for the last week and a half (8 countries in the first three days!), I've not had much time to prepare for this. I've updated it with some of the latest information and unfortunately, I won't be able to give the full presentation as I only have 20 minutes, but I think I can give the core of it.
While I've not included the notes, feedback would be welcome.
Re: Devel::CoverX::Covered features, note that the "What tests cover this subroutine" is actually already there.
From the SYNOPSIS:
#Query the covered database per source file and a specific sub
covered covering --source_file=lib/MyApp/DoStuff.pm --sub=get_odd_values
t/myapp-do_stuff/edge_case1.t
You could also mention Goto Tests - Other Files, and Code Coverage Visualization in PerlySense/Emacs.