Bug 11809

Created attachment 10956 [details]
PDF file from RSC which takes ages to open

Indeed. I believe this may be a cairo problem. If the problem is what I think it is, then this patch against cairo should fix it:
http://lists.freedesktop.org/archives/cairo/2007-June/010856.html

cairo specific

This is another example where we are clipping too much and we don't even need it. With this simple patch:

@@ -3221,11 +3221,13 @@ void Gfx::fillPatch(GfxPatch *patch, int nComps, int depth) {
 void Gfx::doEndPath() {
   if (state->isCurPt() && clip != clipNone) {
     state->clip();
+#if 0
     if (clip == clipNormal) {
       out->clip(state);
     } else {
       out->eoClip(state);
     }
+#endif
   }
   clip = clipNone;
   state->clearPath();

the doc is rendered fast and the output is exactly the same. However there are documents where such clip is necessary. 

*** This bug has been marked as a duplicate of bug 9724 ***

Just as a reference timing (I'm the creator of bug 9724):
Opening RSC pdf takes
- 5 seconds [amd quad 3GHz CPU]
It seems to be something about the use of long columns or tables that is common between these pdfs.

oops. Document Viewer 2.26.2  using poppler 0.10.7 (cairo). on Fedora 11.