Fred
> Vivian Meazza wrote : > > > My latest build with MSVC9 (32 bit) is suffering severe jitter, so > > much that > > it is unusable, as I mentioned earlier. I have profiled the code, but > > nothing obvious showed up yet. I'm continuing to look. > > I tried to compile FG with MSVC9 and it is far more slower than my 7.1 > build. > And the starting stage, loading scenery models, is very long even with > that 7.1 build. > Yes, although changing the optimisation options helps a bit with the frame rate, if not the loading. Profiling suggests this might be the long pole in the tent: simgear\source\simgear\nasal\hash.c With its children it is taking 6% of CPU time. The next highest, groundcache.cxx, takes only 0.4%. I'm not sure if that causes just slow running, or is a possible cause of jitter as well, or indeed if it is significant at all. I can go back to an earlier build dated 04/04/2008, which I happen to have kept, and it is reasonably smooth with good frame rates. I haven't finished profiling that yet. Vivian ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
