The prof(1) reference in the See Also section was removed back in 1998 (r1.10).
Index: gprof.1 =================================================================== RCS file: /cvs/src/usr.bin/gprof/gprof.1,v retrieving revision 1.22 diff -u -p -r1.22 gprof.1 --- gprof.1 23 Dec 2011 17:00:47 -0000 1.22 +++ gprof.1 6 Oct 2016 06:47:58 -0000 @@ -94,9 +94,7 @@ Cycles are also shown, with an entry for a listing of the members of the cycle and their contributions to the time and call counts of the cycle. .Pp -Second, a flat profile is given, -similar to that provided by -.Xr prof . +Second, a flat profile is given. This listing gives the total execution times, the call counts, the time in milliseconds the call spent in the routine itself, and the time in milliseconds the call spent in the routine itself including
