The issue with JavaDoc causing code asssist freezes is indeed a problem in Eclipse Helios (not in Android JavaDoc files).
This is fixed for 3.7: https://bugs.eclipse.org/bugs/show_bug.cgi?id=329288
There is a back-port of this fix for Eclipse 3.6 SR1,
discussed here: http://groups.google.com/group/android-developers/msg/0f9d2a852e661cba
Applying the fix is easy, you just replace org.eclipse.jdt.core_3.6.1.v_A68_R36x.jar inside your Eclipse plugins folder with the file provided in the above message. Here is a direct link: http://adt-addons.googlecode.com/svn/patches/org.eclipse.jdt.core_3.6.1.v_A68_R36x.zip
Kostya Vasilyev submitted a request for this fix to be released with 3.6 SR2 , coming at the end of February.
Chestnut's Shell 
nice article. i’ve think that it was error from dalviks, now i know it just the eclipse version. thank you.
bay the way, i redocumented your article at my sites.
http://tutopod.com/2011/03/16/solution-helios-bug-while-slow-code-assist-for-android/
I cited the article from Kostya Vasilyev =)
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