On Apr 20, 2012, at 9:21 AM, Tommaso Cucinotta wrote: > Hi all, > > I just made a colleague try LyX 2.0.3 on a Mac OS-X > > OS-X: 10.6.8 > LyX: 2.0.3 > > but he immediately complained about how slow it was scrolling a very simple > .lyx document consisting of 3 or 4 pages of contents. > Is there any special trick needed on Mac OS-X to get from LyX what a regular > Mac user considers an acceptable interactivity level / performance ? > > What further information (e.g., from the OS) can I ask to gather in order to > identify the issue, and how such info is obtained ? (I know almost nothing > about Mac). > > I've appended the comment to this bug as well: > > http://www.lyx.org/trac/ticket/7583 > > Thanks, > > T. [I'm not a developer but...]
This problem has been discussed at length here (actually, on lyx-users list) in January and there might already be a ticket for it--at least the developers are aware of the problem. I found partial relief by downloading the source from SVN and compiling 2.1.0 myself. I don't know whether that is within your capability or desire. Also, changing this preference as described from that thread helped: "...one may add the following line to your preferences file: \force_paint_single_char false On a Mac this is the file "~/Library/Application Support/LyX-2.0/preferences". (Broken cursor placement for long lines should be one consequence.)" The last parenthetical comment means that if you make this change, sometimes the cursor will be placed a few pixels from where it should be. The worst case might be a long line of "m"s which is of course contrived, but you might see lesser anomalies in other scenarios. Like I said, "partial relief." With these changes, LyX scrolling is still a far cry from what it is on a "native" app on OS X. There is also a bug on OS X with trackpad scrolling where slow two-finger gestures are ignored--there should be a ticket for that already. (The gesture is ignored if the cursor is in the window content region but not if it is the window's elevator bar.) Jerry
