Just FYI, I made a recent optimized build of Thunderbird which can be found on the Work In Progress page
http://www.palemoon.org/WIP/
The build system has been completely revamped for Thunderbird, so this is a new build from scratch - it also seems to no longer be possible to use profile guided optimization with Thunderbird which hurts the potential optimization I was able to do before.
I may look into building it further with Visual Studio 10, instead, which offers better speed without PGO than v8 does.




