Speedup your symfony2 vagrant box by mounting the app/cache folder into the ram of the vm (run this script as root!)

install_ramcache.sh

#!/bin/sh

# create mount point
if [ ! -d /ram ]
    then
    mkdir /ram
fi

# create ramfs
mount -t ramfs -o size=512M ramfs /ram/

# remove existing cache
if [ -d /var/www/app/cache ]
    then
    rm -rf /var/www/app/cache
fi

# make shure we got the cache-dir for the symlink
if [ ! -d /ram/cache ]
    then
    mkdir /ram/cache
fi

# set proper user (you may need to modify this!)
chown -R www-data:www-data /ram

# link ram-cache into app
ln -s /ram/cache /var/www/app/cache