What is the best way to access lookup values in symfony? On the database or constants?

I am creating a web project 开发者_如何转开发and want it to be optimized. Instead of accessing lookup values in the database (to minimize access), I think it should be stored somewhere in symfony. What is the best way to this? In YML with PHP Array?

You can put values that don't change often in lib/app.yml

You can access those values by using sfConfig::get('value').

app.yml is cool because you can store enviroment specific values in it.

Another option I use for values that should never change and that are not environment-specific is to define constants in a relevant model or helper class.

The advantages are:

1) if you name those constants well using them helps make the code more self-documenting

2) if you use an IDE with autocompletion features it will look up and verify their names as you're coding.

3) they are the fastest possible method of lookup.