Very, very slow

[sfresh]

I looked around on the forums a bit to see if anyone else is discussing this and didn't see anything. I got the pre20 public release lately and while it's mostly awesome, it runs horribly, horribly slowly on my otherwise quite capable computer. Obviously the old ADOM never lagged a bit and was almost instant in saving/loading, but the graphical version has massive input lag that varies from maybe .2 seconds to sometimes a full second. Hit a key, wait, wait, wait, response. It makes playing the game very hard. The lag seems to vary depending on my character's position on the local map. Loading and saving is also getting to be a minute-plus long wait with my level 15 character.

Is the game this slow for everyone else, and we're just waiting on it to be eventually optimized? Or am I having a unique problem?

Edit: To clarify, the game is laggy w/ software or openGL rendering, windowed or fullscreen, and messing with compatibility settings doesn't seem to effect anything.