[Haskell] Performance impact of GHC profiling?

Hi, I have wondered what the approximate execution (not compilation) performance impact (time, space) of compiling all Haskell programs with -prof and -fprof- auto compared to regular compilations. For this purpose, I assume that I would run the executables WITHOUT +RTS -p or any other profiling option. In other words, I would make -prof and -fprof-auto the compilation defaults, but only use profiling runtime occasionally. Does anyone have any data or benchmarks about this? Thanks. Regards, Howard