I'm considering using Zend's accelerator to speed up a php product I've been developing. I have no experience with this sort of tool and was wondering if it would be worth the time/money. My program currently has to make some external request, read/write some data to a database and correlate some data. Including some encoding via base64_encode which seems to take quite a few milliseconds itself.
Your experiences and knowledge in this matter are be greatly appreciated.