On Sat, May 07, 2005 at 11:23:03PM +0200, Helge Hafting wrote: > > > Coarse screen updates when the cpu can't keep up is much better > > > than detailed but lagging updates. > > > > And our real problem is that our updates do not serve only the > > purpose of showing something on screen, but also to put the > > coordcache in some sensible state. This can't be skipped if we > > expect e.g. <down> to work even while typing fast. > > I see. The coord cache must be updated, but I hope the actual drawing > can be skipped ??? when lyx knows that it is behind. That improves > performance in many cases, such as an overloaded machine or X over a > slow network.
The coord cache is filled in the drawing phase (the metrics phase fills the size part of the coord cache only). We _do_ have a 'null painter' which only fills the cache, but if we did metrics + null painter painting + real painting in every case, drawing might get slow. Just a suspicion, though. Andre'
