Excellent, I'm glad these tweaks have improved performance . The full server move hasn't taken place yet, but should happen sometime next week (getting the config correct is taking much longer than I thought), but I'll keep this thread updated as things progress.
Since I joined recently, I too am seeing the same issue. Sometimes is opens lickety split and at other times it can take 20 to 30 seconds or longer and in a few instances not at all. Then an hour later all is lickety split again.
The full server transfer will take place next week as it looks like the new server had a faulty memory module that causes random crashes. I'm doing testing on it now, and if it continues to perform well I hope the transfer can take place next week.
I've made lots of tweaks to the forum database structure which should have helped while it is still running on the old server.