Content caching?

Question

PHP

What is the best use for caching content on the vBulletin forum, self-written image hosting and link shortening? Is it possible to see somewhere an up-to-date (and not dated last or the year before) comparison of eAccelerator, xCache, APC, memcached and others, their pros and cons?
The server works as a bunch of nginx + php-fpm, the statics are planned to be cached using nginx.

Answer 1

There is no need to compare anything, this is a stupid waste of time, the differences are not significant enough to waste time on this. Choose the most suitable api / installation and use it, in any case, any caching system will give a significant increase. And APC will be built into the PHP core (if they haven't done it yet, they promised a long time ago).

Answer 2

I use eAccelerator for opcode and memcached for complex non-critical data. While enough, I had no problems with installation and use.

Answer 3

eAccelerator is dead. The version for 5.3 doesn't even have a caching api.
If you are sure that projects will never outgrow one server, then it doesn't matter. xCache, APC will be even faster. Otherwise memcache.
Of the others, I would recommend redis, it wastes less memory than memcache.