Bug#813369: iceweasel 44.0-1 noticably slower reloading pages than 43.0.4-1

[Arthur Marsh]

Package: iceweasel
Version: 44.0-1
Severity: important

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?

Upgrading to iceweasel 44.0-1 from 43.0.4-1.

I normally run iceweasel without several hundred tabs open and although CPU
and RAM use seemed similar between the versions (around 50 percent CPU when
relatively idle and 1.2 GiB RAM resident on an 8 GiB RAM system), page
loads and refreshing appears very sluggish by comparison.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

Downgraded iceweasel to 43.0.4-1.

   * What was the outcome of this action?

Page loading and refreshing no longer sluggish.

   * What outcome did you expect instead?

*** End of the template - remove these template lines ***


-- Package-specific info:

-- Extensions information
Name: Adblock Plus
Location: ${PROFILE_EXTENSIONS}/{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}.xpi
Status: enabled

Name: Certificate Patrol
Location: /usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/CertPatrol at PSYC.EU
Package: xul-ext-certificatepatrol
Status: enabled

Name: ChatZilla
Location: ${PROFILE_EXTENSIONS}/{59c81df5-4b7a-477b-912d-4e0fdf64e5f2}
Status: enabled

Name: Default theme
Location: /usr/lib/iceweasel/browser/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}
Package: iceweasel
Status: enabled

Name: Easy Youtube Video Downloader Express
Location: ${PROFILE_EXTENSIONS}/{b9acf540-acba-11e1-8ccb-001fd0e08bd4}.xpi
Status: enabled

Name: English (GB) Language Pack locale
Location: /usr/lib/iceweasel/browser/extensions/langpack-en-GB at iceweasel.mozilla.org.xpi
Package: iceweasel-l10n-en-gb
Status: enabled

Name: Flashblock
Location: ${PROFILE_EXTENSIONS}/{3d7eb24f-2740-49df-8937-200b1cc08f8a}
Status: enabled

Name: Furigana Inserter
Location: ${PROFILE_EXTENSIONS}/furiganainserter at zorkzero.net
Status: user-disabled

Name: Japanese Language Pack locale
Location: /usr/lib/iceweasel/browser/extensions/langpack-ja at iceweasel.mozilla.org.xpi
Package: iceweasel-l10n-ja
Status: enabled

Name: NetVideoHunter
Location: ${PROFILE_EXTENSIONS}/netvideohunter at netvideohunter.com
Status: user-disabled

Name: NoScript
Location: ${PROFILE_EXTENSIONS}/{73a6fe31-595d-460b-a920-fcc0f8843232}.xpi
Status: enabled

Name: Rikaichan
Location: ${PROFILE_EXTENSIONS}/{0AA9101C-D3C1-4129-A9B7-D778C6A17F82}
Status: enabled

Name: Rikaichan Japanese Names Dictionary File
Location: ${PROFILE_EXTENSIONS}/rikaichan-jpnames at polarcloud.com
Status: enabled

Name: Rikaichan Japanese-English Dictionary File
Location: ${PROFILE_EXTENSIONS}/rikaichan-jpen at polarcloud.com
Status: enabled

Name: Sage
Location: ${PROFILE_EXTENSIONS}/{a6ca9b3b-5e52-4f47-85d8-cca35bb57596}.xpi
Status: enabled

Name: Sage-Too
Location: ${PROFILE_EXTENSIONS}/{0f9daf7e-2ee2-4fcf-9d4f-d43d93963420}
Status: app-disabled

Name: ShowIP
Location: ${PROFILE_EXTENSIONS}/{3e9bb2a7-62ca-4efa-a4e6-f6f6168a652d}.xpi
Status: enabled

Name: Tab Restore
Location: ${PROFILE_EXTENSIONS}/tabrestore at plugin.xpi
Status: enabled

Name: Tree Style Tab
Location: /usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/treestyletab at piro.sakura.ne.jp
Package: xul-ext-treestyletab
Status: user-disabled

-- Plugins information
Name: IcedTea-Web Plugin (using IcedTea-Web 1.6.2pre (1.6.1-4))
Location: /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so
Package: icedtea-7-plugin:amd64
Status: enabled

Name: Shockwave Flash (11.2.202.508)
Location: /usr/lib/flashplugin-nonfree/libflashplayer.so
Status: enabled


-- Addons package information
ii  icedtea-7-plug 1.6.1-4      amd64        web browser plugin based on OpenJ
ii  iceweasel      43.0.4-1     amd64        Web browser based on Firefox
ii  iceweasel-l10n 1:43.0.4-1   all          English (United Kingdom) language
ii  iceweasel-l10n 1:43.0.4-1   all          Japanese language package for Ice
ii  xul-ext-certif 2.0.14-4     all          Certificate Monitor for Iceweasel
ii  xul-ext-treest 0.16.2015122 all          Show browser tabs like a tree

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.5.0-rc2 (SMP w/4 CPU cores)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Init: sysvinit (via /sbin/init)