The Secret XS Diaries
I just rediscovered an old project of myself when I was learning Perl/XS and wanted to drop a hint to it here.
It might be useful for others who also have no idea how XS works and who would benefit from the approach and point of view of another XS newbie.
It is both the step-by-step description and a CPAN-ready Perl distribution.
You can find it on github: