Hello, Currently there's boost::timer which is a timer based on std::clock(). While this might be sufficient for many people, some want low-level resolution timers. I made a QueryPerformanceCounter() / gettimeofday() wrapper that allows portable millisecond resolution. You'll find attached a basic sample of my trivial work. I tried to make it so inclusion in boost is straight-forward. To see it in action : -Copy the precise_timer* hpp files into the boost directory. -Compile main.cpp & execute it. Would boost be interested by including this class in boost::timer ? I'm all ear for your suggestions / bugs / whatever fits it :) This is the 1st time I propose something to boost so there's probably things to be said on the implementation details (files structure, #ifdef strategy etc) so don't hesitate to tell what should be changed. I also can make that if on windows QueryPerformanceCounter() fails because there's no low-level resolution timer available it uses timeGetTime() instead. But that'd require linking to winmm.lib which could be a problem ( and I never saw a win32 machine where QueryPerformanceCounter() didn't work ). I just thought that I could also rename it to lowres_timer instead of precise_timer, it's more accurate, what do you think ? Regards, Philippe Vaucher