Hi all - The 11-23 build seems to have been bad for some reason (batch delete, message display speed and compose all went up, as well as new window time), so I tested the 27th build on my own time and found that we're 5.11 seconds to read 5 10KB messages in a local folder the 1st time, then 5.07 and 5.04 seconds each consecutive time.
I'm going to just find a build which is normal, and test performance on that, then update the page. The 23rd build was just all around bad, with 1/2 second increases (30%) for Batch Delete Speed. The good news is that Scott has brought us to 4.x parity on Message Display Speed for local messages (which is the same architecture as POP3)! - Stephen http://www.mozilla.org/mailnews/win_performance_results.html
