One user suggested the following tip to improve the applications launch performance.
$ sudo gedit /etc/hosts
You should see something like this:
(and if your in Feisty, some lines about IPV6 also)
Now, edit to:
127.0.0.1 localhost user
(Replace “user” with your hostname).
Save and exit the file.
Now your applications launch should improve.
Currently There are two bugs filed against this you can check here and here .