Performance regression: okular now takes 3x longer to open large PDF documents

[Oliver R.]

okular /usr/share/doc/texmf/pgf/pgfmanual.pdf.gz # from package pgf
takes about 100s on a slow machine (700MHz PIII, 512MB RAM).

This used to be about 30s with okular from Kubuntu 9.04:
Qt: 4.8.1
KDE: 4.8.3 (4.8.3)
Okular: 0.8.2

The factor is roughly the same on a Celeron 3GHz (1GB RAM). It does not seem to be a memory/swap problem.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: okular 4:4.8.3-0ubuntu0.1
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic-pae 3.2.18
Uname: Linux 3.2.0-25-generic-pae i686
ApportVersion: 2.0.1-0ubuntu8
Architecture: i386
Date: Mon Jul 2 17:53:12 2012
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
ProcEnviron:
 LANGUAGE=
 TERM=xterm
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: okular
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.