Totally disagree with Kukoc. A good perefromance is in the eye of the beholder.
There used to be a college player named Alfredick "The Great" Hughes. He played for Loyalo University of Chicago. I believe he led the nation in scoring his senior season. Anyway one game he went 1 for 20, with his one made bucket being a last second 30 footer that won the game. When asked after the game how he felt about missing his first 19 shots, The Great replied, "I stuck that last one and we won the game." Now many people would see his game as horrible. I'll bet his teammates were damn glad he busted that last one, though.
My best performance-
(2167571) Supanut Kaewjaroen. Well, that and his 58 point outburst on June 17th.
Once I scored a basket that still makes me laugh.