Linux RAM speed benchmark

ram_benchmark.sh

#!/bin/sh
set -ex
ram_dir=~/RAM_test

# Create directory and mount RAM-based filesystem:
mkdir $ram_dir
sudo mount tmpfs -t tmpfs $ram_dir
(
  cd $ram_dir
  dd if=/dev/zero of=data_tmp bs=1M count=512 # - write.
  dd if=data_tmp of=/dev/null bs=1M count=512 # - read.
) || true

# Clean-up
umount $ram_dir
rm -rf $ram_dir