Does the AdoDB C extension speed up Concrete?
My experiments with a sufficiently complex page (www.vitanit.com) have shown: no. There even may be a slight time penalty.
To enable it, you'll have to download it, compile it, and add the following to your php.ini:
extension=adodb.so
How do you know that it's installed? phpinfo() will show something like:
ADOdbInfo Extension requires ADOdb classes
Download http://php.weblogs.com/adodb
API Version 5.04
It might be useful for the IdeaDay Import Wizard – which relies heavily on the database.