ultra-fast RAM

sudo mkdir /tmp/ramdisk
sudo chmod 777 /tmp/ramdisk
sudo mount -t tmpfs -o size=1024m myramdisk /tmp/ramdisk

command to check

mount | tail -n 1

ramdisk is mounted

mariusz@laptop-debian:~$ mount | tail -n 1
myramdisk on /tmp/ramdisk type tmpfs (rw,relatime,size=1048576k)
mariusz@laptop-debian:~$

test write speed

sudo dd if=/dev/zero of=/tmp/ramdisk/zero bs=4k count=10000

test read speed

sudo dd if=/tmp/ramdisk/zero of=/dev/null bs=4k count=10000

unmount ramdisk

sudo umount /tmp/ramdisk/

auto-mount on system boot

sudo nano /etc/fstab

add

myramdisk  /tmp/ramdisk  tmpfs  defaults,size=1G  0  0