On Wed, May 30, 2007 at 01:39:58PM +0200, Helge Hafting wrote: > While testing scrolling, I noticed that moving the cursor around seems to > be rather heavy work. > > Moving the cursor sideways on a line is snappy, but this movement > takes 33% of the cpu according to top. > > Moving the cursor up/down seems sluggish compared to sideways > movement, and LyX spend 61% of the cpu on doing this. This is > according to "top", on a load meter it looks more like 90%. > > This is just moving the cursorm around. Nothing is changed, > and no scrolling either. Only the cursor itself is moved. > This on a 2.4GHz pentium, with --disable-stdlib-debug > > Is this a known problem, with a planned fix? > > It cannot possibly be necessary, and of course other software > don't do this. Thunderbird needs 6% of the cpu to do the same.
There's a difference between displaying more or less static text and having the same text with wildly variying objects in an editable state. But you are right, scrolling is still too expensive. Andre'
