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profile: n. 1. A control file for a program, esp. a text file
   automatically read from each user's home directory and intended to
   be easily modified by the user in order to customize the program's
   behavior.  Used to avoid hardcoded choices (see also dot
   file, rc file).  2. [techspeak] A report on the amounts of
   time spent in each routine of a program, used to find and tune
   away the hot spots in it.  This sense is often verbed.  Some
   profiling modes report units other than time (such as call counts)
   and/or report at granularities other than per-routine, but the idea
   is similar.