Re: LyX slow in Windows XP

[Abdelrazak Younes]

Enrico Forestieri wrote:

On Sat, Oct 14, 2006 at 05:56:24PM +0200, Abdelrazak Younes wrote:

Jean-Marc Lasgouttes wrote:

"kmailuk" == kmailuk  <[EMAIL PROTECTED]> writes:

kmailuk> Hey! With "instant preview" turned ON there is a noticeable
kmailuk> performance improvement (i.e. speed is not a problem any
kmailuk> more). Why would that make things run faster? (I prefer the
kmailuk> way LyX looked with instant preview off but I can't
kmailuk> complain).

It seems that math equation display is really slow for some reason,
but I cannot guess why.

I am guessing that this has to do with the scrolling code in BufferView. I know this is difficult to do right but this thing is slowing scrolling enormously especially when there is math. I think I would prefer a bad scrollbar position and good performance.

I heartily second this.

Abdel.

Index: BufferView.C
===================================================================
--- BufferView.C        (revision 15324)
+++ BufferView.C        (working copy)
@@ -394,6 +394,9 @@
                return;
        }
 
+       scrollbarParameters_.reset();
+       return;
+
        LyXText & t = buffer_->text();
        int const parsize = int(t.paragraphs().size() - 1);
        if (anchor_ref_ >  parsize)  {

But in this case, it's not only that. The attachment in the bugzilla entry is still slow when I disable the scrollbar update in bufferview with the attached patch. So this is more complicated than a simple scrollbar issue as I initially thought. Asger, if you have already finished with my task list you could ask Andre how we could optimize the editing of the attached document.

attachment.lyx
Description: application/lyx