Optimisations aren't universally better, that's why compilers don't apply them by default. Having applied the patch to the development version (0.28) the optimisations broke audio sample rate conversion, and from past experience -O3 has probably negatively impacted video decoding.
Realistically we don't want to be building with anything more than -O2, -O3 optimisations are at best experimental. -- You received this bug notification because you are a member of Mythbuntu Bug Team, which is subscribed to Mythbuntu. https://bugs.launchpad.net/bugs/1390965 Title: Optimization flags not used Status in Mythbuntu, Ubuntu derivative focused upon MythTV: New Bug description: MythTV ticket 12015 outlines how mythtv is not compiled with any optimizations at all. Mythtv developers seem to not care at all, but this has major performance implications. It can be worked around by simply configuring mythtv with "--extra- cxxflags=-O3" Doing this wll significantly improve mythtv's performance for all users To manage notifications about this bug go to: https://bugs.launchpad.net/mythbuntu/+bug/1390965/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~mythbuntu-bugs Post to : [email protected] Unsubscribe : https://launchpad.net/~mythbuntu-bugs More help : https://help.launchpad.net/ListHelp
