Thread:Manual talk:Extension registration/Caching only via APC?/reply (2)

Thank you for your answer. I guess that 15 to 25 extensions is a good pick for an average regular wiki out in the wild. So working with some sort of caching seems to be very advisable for them in the future. I believe that in general it should therefore be possible to choose other ways than just APCu in a sense of providing more options. Thus it will indeed be cool to implement support for other caching mechanisms. So to sum up the current situation: Do you have an insight about the performance impact this system of extension registration has in comparison to the current system?
 * PHP <= 5.4 -> APC which "includes" APCu
 * PHP >= 5.5 -> APCu