I recently updated many plugins in my heavily loaded Eclipse 3.6. I have been holding off on doing this. Every time I seem to do an update of any sort I get shafted worse than what the IRS does to me.  I Then contemplate throwing my laptop out the window followed by doing a line of coke.

Updating AspectJ came close to that but my I knew it would it happen so I was ready for the disappointment.

1. Update…
2. wait for ever
3. Click to ignore NPE (this has become normal in Eclipse) You know its working if you have a couple of these :)
4. Cross fingers and restart Eclipse
5. Regret not backing up. 
6. Eclipse seems faster :)
7. Crap AspectJ completion bye bye

TO FIX IT: http://wiki.eclipse.org/JDT_weaving_features

Most importantly click on the “Window->Preferences->JDT Weaving->Reindex Now”

Now watch Eclipse get slow again :(