|There's more than one way to do things|
Re^7: Why is MySQL so slow? (3%)by tinita (Parson)
|on Jul 22, 2011 at 11:42 UTC||Need Help??|
I believe that it also depends a lot on the nature of the application. In my experience it feels more than 3%. Also "premature" optimization depends on experience. The more applications you've written or maintained and optimized, the more decisions about algorithms and software architecture you can make in advance.