Public bug reported:

Update-manager seem to take something like 0.3s to refresh each package
in the list (when there is 343 updates, took about 3 min to refresh the
whole list).

To reproduce: 
- with some updates waiting
- open update-manager
- click on the check button
- wait for the update progress window to close
-> Watch the onscreen package list being slowly updated one package after the 
other.

Possible cause: extraneous list refresh function being called after each
addition/removal to the list

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.6
ProcVersionSignature: Ubuntu 3.2.0-17.26-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
ApportVersion: 1.93-0ubuntu2
Architecture: amd64
Date: Sat Mar  3 12:40:50 2012
DpkgHistoryLog.txt:
 
DpkgTerminalLog.txt:
 
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/update-manager
GsettingsChanges:
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1330774583
 com.ubuntu.update-manager show-details true
 com.ubuntu.update-manager window-height 913
 com.ubuntu.update-manager window-width 1173
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 
(20120201.2)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: Upgraded to precise on 2012-02-16 (16 days ago)

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise

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https://bugs.launchpad.net/bugs/945536

Title:
  Excrutiatinling slow package list onscreen update

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