Пакет php5-xcache: Информация

XCache is a open-source opcode cacher, which means that it accelerates
the performance of PHP on servers. It optimizes performance by removing the
compilation time of PHP scripts by caching the compiled state of PHP scripts
into the shm (RAM) and uses the compiled version straight from the RAM. This
will increase the rate of page generation time by up to 5 times as it also
optimizes many other aspects of php scripts and reduce serverload.