RamPartition.sh

#!/bin/bash 
#Set the name of the ram disk
RAMDISK = "xcodeDeriveData" 

#Set the size of the ram disk, here is 2048 MB
SIZE = 2048

#space allocated to the xcodeDeriveData
diskutil erasevolume HFS + $RAMDISK `hdiutil attach -nomount ram://$[SIZE * 2048]`

#Open the metadata index. This is necessary if you use Xcode's internal debugging tools.  Because debugging tools use metadata indexes to query symbolic links
mdutil -i on /Volumes/$RAMDISK