On Jan 2, 2012, at 8:57 PM, Murat Yildizoglu wrote: > Hi Jerry, > Is the document that you are editing exceptionally huge?
No—it is only a few paragraphs of e.g. "lorem ipsum" or whatever. Adding a few equations doesn't seem to make any difference; if anything, it might make scrolling faster (not sure) possibly of having less text to render. Also, I recall in the LyX docs seeing a page which was a full page of a pre-rendered image, and when LyX came to that page, it scrolled faster, then slowing again when the pre-rendered page passed. > I am working on a 100+ pages manuscript with lots of equations and figures > without any problem. I am know under Lion on a 2011 MBP, I wouldn't think Snow Leopard versus Lion would make an difference, but _something_ is apparently different between our systems. I think I'm using Qt 4.7.0. (Is there a 32-bit or 64-bit issue here?) > but I do not remember having met problems with my Snow Leopard 2008 MBP. But, > I have seen in the past some ails about this problem, have you searched the > mail list archive? Maybe this is a specific problem for which there could be > solutions. I did a quick check of the archives but didn't see much that I thought was relevant. Jerry > > Murat > > 2012/1/3 Jerry <lancebo...@qwest.net> > I'm evaluating LyX for a major project and am mightily impressed. > > However, there is one problem that stands out: Scrolling the main LyX window > is excruciatingly slow. I'm using LyX 2.0.2 and OS X 10.6.8. It doesn't seem > to matter how I scroll--two-finger swipe on MacBook Pro trackpad or using the > thumb bar or clicking on the normal scrolling arrows. When scrolling rather > fast or using the two-finger "ballistic scrolling", there are large jumps > between screen updates; sometimes the jump is more than an entire screenful > so there is little hope of reliably spotting things as they go by. While > scrolling, processor usage goes to 100% > > The problem seems to be (just guessing here) that text rendering is slowing > things down, as if screen drawing is not being buffered. If I make the window > narrower, things seem to improve a little, also if there is a part of the > document that has less text because of graphics or white space. Also, making > the text larger seems to help--again, pointing to problems rendering text > > Enabling "pixmap cache" helps a little but it makes the on-screen fonts hard > to read because it does away with sub-pixel antialiasing, which I hate. > > I'm actually kind of distressed about this because of the prospect of > spending months writing in LyX, and I'm surprised that this problem exists as > prominently as it does. > > Is there a work-around? I've tried a few different fonts but that doesn't > seem to help. > > Thanks, > Jerry > > > > -- > Prof. Murat Yildizoglu > > Université Montesquieu Bordeaux IV > GREThA (UMR CNRS 5113) > Avenue Léon Duguit > 33608 Pessac cedex > France > > Bureau : F-331 > > yi...@u-bordeaux4.fr > > http://yildizoglu.info > > http://www.twitter.com/yildizoglu >
