Pascal Obry writes: > Stephen Leake writes: > > > > > What I would like to know is if anyone has programming (recently) > > > for real time and what the current performances and specifications > > > are for the Real_Time package? > > > > For any language: > > > > On Unix, 1 second. > > > > On Windows NT, 10 milliseconds. > > > > On VxWorks PowerPC, 100 microseconds (I think). > > I'am not sure what these values mean here. If it is the Clock > precision then under NT it depends. The GNAT implementation use a > performance counter and has a precision less than 1E-6 seconds, so > far better than 10 milliseconds :) For what it's worth, so does Janus/Ada. But ObjectAda and Rational Apex Ada uses the standard clock tick for Calendar.Clock. Which is 10 milliseconds on Windows NT; but if you run the same program (even the same executable) on Windows 95/98, it is about 55 milliseconds. All of which makes the original point: this depends completely on the target system *and* implementation. The (original) question cannot be meaningfully answered without knowing both the target system and implementation. Randy.