Best Cache?

[PrimalPrime]

Which one is the best?

SMF supports caching through the use of accelerators. The currently supported accelerators include:
APCu
Memcached
SQLite3
PostgreSQL
Zend Platform/Performance Suite (Not Zend Optimizer)
Caching will work best if you have PHP compiled with one of the above optimizers, or have memcached available. If you do not have any optimizer installed SMF will do file based caching.

Thanks!