Bug#848669: devhelp: Unusably slow

[Yasushi SHOJI]

Package: devhelp
Version: 3.22.0-1
Severity: normal

Dear Maintainer,

I've just noticed that devhelp is unusably slow to react to user intput.

Just run devhelp (either from GNOME Shell or command line prompt) and
click or scroll, you should see the slowness.  I'ts slow but top or
htop don't show CPU usage.  Rather, it feels like it's not getting
events from X.

I've tried to run Jessie version of devhelp but it seg faults.  Also
tried experimental version of libwebkit2gtk-4.0-37, but didn't change.

I also noticed that epiphany-browser is scrolling slow.  So, it might
not be devhelp's fault but common libraries have some issue.

Thanks,

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: armhf, armel

Kernel: Linux 4.8.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages devhelp depends on:
ii  libatk1.0-0                  2.22.0-1
ii  libc6                        2.24-8
ii  libcairo-gobject2            1.14.8-1
ii  libcairo2                    1.14.8-1
ii  libdevhelp-3-2               3.22.0-1
ii  libgdk-pixbuf2.0-0           2.36.1-1
ii  libglib2.0-0                 2.50.2-2
ii  libgtk-3-0                   3.22.5-1
ii  libjavascriptcoregtk-4.0-18  2.14.2-1
ii  libpango-1.0-0               1.40.3-3
ii  libpangocairo-1.0-0          1.40.3-3
ii  libsoup2.4-1                 2.56.0-1
ii  libwebkit2gtk-4.0-37         2.14.2-1

Versions of packages devhelp recommends:
ii  libglib2.0-doc   2.50.2-2
ii  libgtk-3-doc     3.22.5-1
ii  libpango1.0-doc  1.40.3-3

devhelp suggests no packages.

-- no debconf information
-- 
             yashi