I run php7 + opcache, mariadb 10.1 on an SSD cloud infrastructure... so read/write is pretty sweet. Is memcached really going to do a whole lot or not? I have read through older threads, but they were always based on spindle HDD's. Saying that, from reading, memcached targets session storage of string and such info, storing dynamic aspects for faster loading. Opcache is purely precompiling php scripts. So... is it worth using something like memcached? Are the results with php7, mariadb and SSD really going to be worth while when the data flows so easily without I/O being a factor?