Hi all,
This tip might be of interest for you : http://wccftech.com/turn-app-nap-specific-applications-os-mavericks/
Practically Maverick puts some applications to "sleep", when not used. For my laptop busy with Vidyo that resulted in Adobe Reader to be super slow, as by the time people on the meeting would get to next page, my pdf would freeze [==asleep] and it would take ages to turn a page. By then the speaker would naturally be few pages ahead - very annoying if you chair the meeting...
After I have disabled this AppNap for AdobeReader, I did not have delays anymore [so far].
Also vidyo and cern webcast seem to take insane amount of CPU after upgrade..
Cheers, Olya