I have updated the profiler library to take into account many of the excellent suggestions. I have tried to give acknowledgements where it is due, please let me know if I have overlooked anyone. The latest version is at: http://www.cdiggins.com/profiler The major changes are: - defining BOOST_PROFILING_OFF causes all member calls to become empty statements - basic_profiler now has three policies: logging, stats, timer - profiler now supports: restart, stop, pause, resume, generate_report - fixed QueryPerformanceCounter() api bug in HighResolutionTimer If you have brought an issue up previously (or think of a new one) which you feel is a significant omission of this library and would affect whether or not you could use it, please feel free to bring it up again. I am still looking for a posix high-resolution timer. Hartmut suggested a couple of Posix timers which he got off of Google, which unfortunately were unusable: one was GPL'ed and the other lacked source code. Gennadiy said there were some on the mailing list (I couldn't find ), and that he uses one in the CVS but I don't know how to use the CVS. I also can not test Posix timers, since I only use visual C++. I believe that perhaps boost::date_time contains a good resolution timer, but I can't tell. Christopher Diggins Object Oriented Template Library (OOTL) http://www.ootl.org