> > would give 3-4 microsecond precision on "deltas" but an initial uncertainty of > ^^^^^ > > the usual 15 milliseconds or so. > > > This is a output of the mentioned profiler. It say about a minimal time of about 1-2 >us. May the difference be > caused by the cygwin.dll overhead ? (We're using the native functions, not >gettimeofday()). > > [1828] EmptyTest count: 100 time: (min) 1 [us] (max) 2 [us] >(sum) 169 [us]
On my machine it's actually 1.74us, but I made the test on some machines and the result varies from 1.05 to 5.9us (excluding a single machine for which it takes 11.45us). That using my own profiles that uses the "adapted gettimeofday(), so it has a ilttle bit more of overhead to divide it in the secs and usecs fileds. -- Lapo 'Raist' Luchini [EMAIL PROTECTED] (PGP & X.509 keys available) http://www.lapo.it (ICQ UIN: 529796) -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
