comparing the generated overall memory benefit data associated with each of the plurality of {HEAD ~ applications} to determine {TAIL ~ memory needs} of the applications 
to determine
comparing the generated overall memory benefit data associated with each of the plurality of { HEAD ~ applications } to determine { TAIL ~ memory needs } of the applications
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH