This is great stuff! Mailnews doesn't care about hard-core-test - my
bugzilla spam folder with 8000 msgs - I can scroll it with the mouse
very fast, almost smooth. It can keep up with my mouse movements (~0.25
from top to bottom).
Scrolling down (caret down) with keyboard updates to lazily and also
could be faster. But still no comparison to old thread pane.
However, there are lots of major bugs. E.g. plaintext msg display styles
are completely horked (e.g. all prefs are ignored). I wish, you landed
the branch after 0.8.1. Is there any (without too much hassle) way to
get a 0.8.1 build with the old thread pane?
