On the first request -- the JSP will require to be translated and compiled into a servlet (unless it was precompiled) -- so on the first request the JSP will definately be slower. But after that they should perform similarly (both are servlets). Realize though, that there are situations where a JSP is better equipt than a servlet (like when heavy amounts of output is sent to the screen) and vice-versa.
hi i agree with jessica. the important question u should be asking is what the servlet/jsp is really doing. If its just outputting html then u should design it in a jsp. if it played the role of a lets say a controllet u would be better off writing a servlet. in a production environment u would do post-deployment testing --implying that u would have hit every jsp page and compiled them in the process, hence the performence would be the same. but as jess put it jsp are equiped to do certain stuff better than servlets and vice-versa. regards syd