> > On 12 Feb 2013, at 21:15, Robert Vogel wrote: > > > > Originally the UI was generated using Fluid, > > but lately I have been hand-coding it. > > Just to be sure there is no misunderstanding > > the formerly generated code is now an > > element called NotGenerated.cxx. It contains > > a small routine, LightIt, which colors > > the bars when sequencing and scrolls. > > The last line of LightIt is a redraw statement. > > If I comment it our in Fedora, timing recovers. > >=20 > > I use the same 64 bit machine for both U12.4 and F17. > > So, here's the question: What's the difference > > between Ubuntu and Fedora that could cause this ? > > > Hard to say: there is *nothing* in the fltk lib that knows about = > different Linux distro's, so we don't do anything different for Ubuntu = > vs Fedora. Or any other linux for that matter... > > Hmm, OK, I just tried a run on a VM here; Ubuntu 12.10 32-bit vs F17 = > 32-bit, with some rendering tests I had. No idea how representative that = > will be of your usage, mind you... > > Didn't really see much, if any, difference in the numbers - both came = > out about the same in every test. In my GL frame test the Ubuntu box = > came in at 152 fps, the F17 was at 149, but other tests I couldn't say I = > saw any difference that was not just noise. > > Ah, now, here's a thought - What graphics card are you using? > > Ubuntu quite often will install the vendor supplied (non-free) binary = > drivers, whereas F17 will not (unless you force it to) and that can make = > a *substantial* difference to rendering. > > In particular if you have a Nvidia card, the vendor binary driver is = > *much* faster than the nv/nouveau free drivers; in one test I did = > recently the nv driver managed 18 fps, the nvidia driver was over 500 = > fps. Running *the same* executable. That sort of delta might make a = > difference! >
Thank you for your note. I think you are correct...I DO have an Nvidia card. But, since it was not too straightforward to install the drivers, I didn't prove it. _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
