Devel::NYTProf, Adam Kaplan’s original creation and Tim Bunce’s ongoing gift to the Perl community, is the new star of my “Profiling” chapter. However, the static book format doesn’t do much to show it off.
Other than that, I went through all of the code and output with v5.18 to refresh it. Not much changed other than the times getting much faster almost a decade later.
You can read this chapter in O’Reilly Atlas.