It's a not so well kept secret that CakePHP is slow. What isn't well know is that this is done by design. I could get in a lot of trouble by revealing this, but I'm willing to take that risk. [...] Every time you use one of the tips in this article it's one less gold chain on the neck of a Cake developer.

Here's his list of eight tips:

• Set Debug to 0
• Cache your slow queries/web service requests/whatever
• View Caching
• HTML Caching
• APC (or some other opcode cache)
• Persistent Models
• Store The Persistent Cache in APC
• Speed Up Reverse Routing

Some of the tips are CakePHP specific, but several of them (the caching) can be useful no matter what sort of application you're using - framework or not.