Bug#354822: epiphany-browser: Epiphany (when compiled with Xulrunner) is slow

[Sam Morris]

Package: epiphany-browser
Version: 1.8.5-2
Severity: normal

Since the switch to xulrunner, I have noticed Epiphany's performance
dropping in several noticeable areas:

 1. On a largeish page such as <http://planet.gnome.org/>; when clicking
    on a link, the click takes about 1 second to be recognised.

 2. There is a delay when switching between several tabs. The delay is
    variable; usually between 100 and 250 ms, though I have seen tab
	switching take half a second. This is most noticeable when the
	browser has been open for a while, and the user has one or more tabs
	that contain two large pages. Right now I have Planet Gnome,
	Slashdot and a few Debian bug reports open. Switching between the
	bug report pages is instant, but any other transition incurs the
	delay.

 3. Again on Planet Gnome, it takes almost a second for the find bar to
    appear after hitting C-F or forward-slash. Likewise, after
	hitting escape, it takes almost a second for the bar to be
	dismissed.

 4. Closing tabs can also take up to a second if the tab contains a
    large page.

-- System Information:
Debian Release: 3.1
  APT prefers testing
  APT policy: (530, 'testing'), (520, 'unstable'), (510, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.15-1-k7
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)

Versions of packages epiphany-browser depends on:
ii  gconf2                 2.12.1-9          GNOME configuration database syste
ii  gnome-icon-theme       2.12.1-2          GNOME Desktop icon theme
ii  iso-codes              0.44-1            ISO language, territory, currency 
ii  libart-2.0-2           2.3.17-1          Library of functions for 2D graphi
ii  libatk1.0-0            1.10.3-1          The ATK accessibility toolkit
ii  libaudiofile0          0.2.6-6           Open-source version of SGI's audio
ii  libavahi-client3       0.6.7-1           Avahi client library
ii  libavahi-common3       0.6.7-1           Avahi common library
ii  libavahi-compat-howl0  0.6.7-1           Avahi Howl compatibility library
ii  libbonobo2-0           2.8.1-2           Bonobo CORBA interfaces library
ii  libbonoboui2-0         2.10.1-2          The Bonobo UI library
ii  libc6                  2.3.5-13          GNU C Library: Shared libraries an
ii  libcairo2              1.0.2-3           The Cairo 2D vector graphics libra
ii  libdbus-1-2            0.60-6            simple interprocess messaging syst
ii  libdbus-glib-1-2       0.60-6            simple interprocess messaging syst
ii  libesd-alsa0 [libesd0] 0.2.36-3          Enlightened Sound Daemon (ALSA) - 
ii  libfontconfig1         2.3.1-2           generic font configuration library
ii  libfreetype6           2.1.10-1          FreeType 2 font engine, shared lib
ii  libgcc1                1:4.0.2-9         GCC support library
ii  libgconf2-4            2.12.1-9          GNOME configuration database syste
ii  libgcrypt11            1.2.2-1           LGPL Crypto library - runtime libr
ii  libglade2-0            1:2.5.1-2         library to load .glade files at ru
ii  libglib2.0-0           2.8.6-1           The GLib library of C routines
ii  libgnome-desktop-2     2.12.2-2          Utility library for loading .deskt
ii  libgnome-keyring0      0.4.7-1           GNOME keyring services library
ii  libgnome2-0            2.12.0.1-5        The GNOME 2 library - runtime file
ii  libgnomecanvas2-0      2.12.0-2          A powerful object-oriented display
ii  libgnomeprint2.2-0     2.12.1-3          The GNOME 2.2 print architecture -
ii  libgnomeprintui2.2-0   2.12.1-2          GNOME 2.2 print architecture User 
ii  libgnomeui-0           2.12.1-1          The GNOME 2 libraries (User Interf
ii  libgnomevfs2-0         2.12.2-6          GNOME virtual file-system (runtime
ii  libgnutls12            1.2.9-2           the GNU TLS library - runtime libr
ii  libgpg-error0          1.1-4             library for common error values an
ii  libgtk2.0-0            2.8.12-1          The GTK+ graphical user interface 
ii  libice6                6.9.0.dfsg.1-4    Inter-Client Exchange library
ii  libjpeg62              6b-10             The Independent JPEG Group's JPEG 
ii  libmozjs0d             1.8.0.1-5         The Mozilla SpiderMonkey JavaScrip
ii  libnspr4-0d            1.8.0.1-5         NetScape Portable Runtime Library
ii  liborbit2              1:2.12.4-1        libraries for ORBit2 - a CORBA ORB
ii  libpango1.0-0          1.10.3-1          Layout and rendering of internatio
ii  libpng12-0             1.2.8rel-5        PNG library - runtime
ii  libpopt0               1.7-5             lib for parsing cmdline parameters
ii  libsm6                 6.9.0.dfsg.1-4    X Window System Session Management
ii  libstartup-notificatio 0.8-1             library for program launch feedbac
ii  libstdc++6             4.0.2-9           The GNU Standard C++ Library v3
ii  libtasn1-2             0.2.17-1          Manage ASN.1 structures (runtime)
ii  libx11-6               6.9.0.dfsg.1-4    X Window System protocol client li
ii  libxcursor1            1.1.3-1           X cursor management library
ii  libxext6               6.9.0.dfsg.1-4    X Window System miscellaneous exte
ii  libxi6                 6.9.0.dfsg.1-4    X Window System Input extension li
ii  libxinerama1           6.9.0.dfsg.1-4    X Window System multi-head display
ii  libxml2                2.6.23.dfsg.1-0.1 GNOME XML library
ii  libxrandr2             6.9.0.dfsg.1-4    X Window System Resize, Rotate and
ii  libxrender1            1:0.9.0.2-1       X Rendering Extension client libra
ii  libxslt1.1             1.1.15-2          XSLT processing library - runtime 
ii  libxul0d               1.8.0.1-5         Gecko engine library
ii  python2.3              2.3.5-9           An interactive high-level object-o
ii  zlib1g                 1:1.2.2-4.sarge.2 compression library - runtime

-- no debconf information