--- Execution time profiling ---

 gprof is the Gnu Profiler, similar to another program "prof".

 To run it on somthing like fib.c :

 (1) gcc -pg -g fib.c -o fib

     The "-pg" includes the gprof stuff
     Other interesing options: 
        -msupersparc		comiler hint
	-a			line by line profiling

 (2) run the program as usual.  A normal exit will create
     a gmon.out file that has the profiling date.

 (3) run gprof on analyze the data.  (On akbar, /usr/local/bin/gprof)
      gprof fib gmon.out > fib.profile
     will analyze the executable fib using it's gmon.out to 
     produce a profile listing fib.profile.

 Apparently this does execution times and call stacks but not memory.

 --- Memory profiling -----------------------------

 on Linux, I see we do have a "memprof" utility installed
 (/usr/bin/memprof) but haven't seen enough about how to use it.