FWIW: If there is going to be a thoroughly revamped profiler, I'd prefer it to something like Devel::SmallProf. It's line-by-line granularity seems considerably more useful to me.

I also like it's ability to control what gets profiled through the inclusion of in-line directives (global assignments.

The downsides are that it is rather slower than some other profilers and doesn't work with or have the equivalent of dprofpp. That said, it's native output format is emminently usable, and easily manipulated with an editor, Perl or most other text-based tools like grep etc.