Back-End Optimization?

How to optimize the site's back-end load time

[rob7591]

Does anyone know of a good website that shows how to optimize the back-end of a website? (Database connections, PHP code, etc.)

I have optimized my Front-End as much as I think I can (using YSlow), and I think the back-end is my bottleneck now. It's probably taking around 60% of the load time, and according to the web speed optimization guy at Yahoo, it's only supposed to take around 10%.

[vincevincevince]

Look up 'PHP timing' and 'php benchmarking' - there are many functions and classes which do a great job at finding out which parts of your scripts take the time.