On Tue, May 12, 2009 at 1:47 PM, David J Taylor <[email protected]> wrote: > It depends what accuracy is desired. I've just been trying serial over USB, > which was "useless" by general opinion, and yet it seems to be providing > offsets within half a millisecond, jitter around 50 microseconds. Perhaps > that's good enough? Perhaps not?
I agree. Offsets <0.5ms are more than enough for the vast majority of business applications. Low-latency securities trading, scientific instrumentation, and a few other other problem spaces might require better timing. But those applications are actually relatively rare in my experience. Actually, now that I think of it, trading applications are the only ones I have personal experience with that really required sub-millisecond timing. Even simple applications like security logs are rarely accurate to more than a few tens of milliseconds because of network, disk, and OS-induced jitter. _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
