Okay, so everything was working fine. Running well, having fun. Suddenly, when I stopped the server, it took forever to get past the first 'Stopping server...' message. I just let the computer sit until I went to bed and when i came back it was done. Next morning: Started the server, loads fine. Set it to day just to be sure it's day, and it takes several seconds before it tells me I set the time. I start to join with Minecraft, and it hangs at 'Logging in...'. I hit Cancel and type "say lag test" into the console. Counted - 4 seconds until it came up. I tried joining again. When I finally got in, it took FOREVER to load three chunks, and when I typed something it didn't even appear in the console after something like 10 seconds. I ragequit and started to turn off the server, and instead of waiting for it to turn off again I force-closed it. Well, what's the darn problem? I'm using Windows 7 Home Premium 32-bit... Java 6 update...26 I think. Bukkit 453. 953 Hamachi is running, but I have this server port forwarded. EDIT by Moderator: merged posts, please use the edit button instead of double posting.
Well, actually i had this problem once aswell, it did go away itself. Try reinstall .minecraft folder
It's not only MC itself, cuz the say command is slow aswell. Try it with a new world once, then place the old one back.