Profiling support?

Looking in the Makefile, I just find support for coverage reports using gcov. Whatever is there with "profile" in it seems to be for profile-based compilation rather than using gprof.

Now since I've managed to push most of the runtime for basic git-blame operation out of blame.c proper, it becomes important to figure out where most of the remaining runtime (a sizable part of that being system time) is being spent. Loop counts like that provided by gcov (or am I missing something here?) are not helpful for that, I think I rather need the kind of per-function breakdown that gprof provides.

Is there a reason there are no prewired recipes or advice for using gprof on git? Is there a way to get the work done, namely seeing the actual distribution of call times (rather than iterations) using gcov so that this is not necessary?