Several people, including me, have reported that performance drops are happening every 5-8 seconds. I opened task manager and found out that the game is using up over 750,000 K of memory and half of my CPU.
I'm using Windows 7 64 Bit. Not sure about anyone else, but this needs to be addressed quickly before someone's game crashes because of the performance drop.
Edit: It's been fixed! Thanks Helios!
Windows 64-bit uses quite a lot of memory for work, and it is possible that SK is running on 64-bit java too. By using 64-bit, the game is programmed to dedicate more RAM to it, therefore taking up more RAM. If you find the game using too much memory, switch to 32 bit java, or switch to windows 32-bit mode.
0.75 GB of RAM is too much for Windows 64-bit? You ought to have at least 8GB of RAM if you were using 64-bit.
Yet again, it could be badly optimized for 64-bit as always. I don't really know.