Kinda reminds me of a thread earlier this week:
"How does this software work: I don't understand the hype"
http://forums.adobe.com/message/5204460#5204460
If the OP would give us some more information, maybe we could help -- OS, hardware configuration, other software running in the background, RAW or JPG, etc. Many of the regulars here are hardware and software professionals in addition to being LR experts, so with more info, perhaps they could solve this.
John
