Hi Guys, On Saturday 09 March 2013 00:16:01 Alexandre Couture wrote: > Hi everyone! > This week I've been playing with DraftSight both on Linux and on > Windows. DraftSight is a Qt4 CAD drawing program that is very similar > to AutoCad and it is available for free both for Windows and for > Linux. Like you I use DraftSight on PCLoS. > I used DraftSight for many months on Linux on my Core 2 Duo with 2gb > of RAM computer and it is sluggish. Each time that I select a part of > the drawing to modify an attribute there is a 5-10 second delay > before the program unfreeze. I find the same problems ! Maybe not quite as severe but certainly the graphics performance leaves something to be desired. I'm currently running a dual core 3Gig P4 with 1Gb ram. > On my Windows-only laptop that I use mainly for running industrial > automation software, I have installed DraftSight this week. This > laptop is an old IBM ThinkPad A31p with a 1.7GHz Pentium 4 cpu and > 512mb of RAM. It runs Windows XP. On this laptop, DraftSight runs > perfectly well and there is no delay when I click on a part of a > drawing, even if it is a much slower computer and the general > performance of DraftSight is much better on Windows. On my laptop, a 1300Mhz 1Gb running Open SuSE 11.1, DraftSight runs a lot more smoothly without the jerky mouse and refresh delays. > Is there a reason why I see such a big difference between this Qt4 > program on Linux and on Windows? Does the difference is because of > Qt4 or it could be because DraftSight has not been ported as well as > it could be? ?? That could be a question for the DS developers. > Qt3 has a very high performance and on a slow computer, it is even > faster than GTK2. The UI element are drawn faster than almost every > other GUI toolkits. Why does QT4 still suffer from these performance > issues? > > Have an happy spring break! > -Alexandre -- Best Regards: Baron