How to make website work speedily

There can be two approaches:

#1: It needs detailed review of architecture, design of key components and critical parts of the code. I can hardly imagine you can share all this in a reasonable amount of time and get reviewed. I think this is well beyond the CodeProject format. Rather you could hire a good consultant, of the "fixer" type.

#2: You could thoroughly profile all your code and obtain good amount of timing information in order to identify the performance bottlenecks. I'm not sure you can use standard profilers to profile a Web site code (may be I'm just unfamiliar with such products), but your certainly could build your own, very basic profiler and start getting timing data.

Both ways are pretty difficult. At the same time, chances are, the reason of the performance leak can be quite simple and detectable by someone with a fresh eye. Again, it's impossible to say anything else based on the information you provide.

—SA