<p>I do use ramdisk on high-loaded webserver to store some static data which server refers to tens times per second, in this way it is a speed improvement. What are you trying to speed-up? Basically you will need to determine which files your application uses more often and put them into ramdisk. /dev/shm actually is not meant to be used by user, better way is to allocate separate ramfs disk and use it for that purposes.</p>