discusuion is compression of video games better or not?

[jorg]

oka so the ps3 has a set read speed for games at 9mb/s know dose compression work for games the same way it dose for video's or archives were it transfer the compressed data say 15 mb when uncompress it, meaning after its off the disc and unpacked inside the console its say 40mb of data? or dose it not work that way since video games render completely in a console.
becuase i was just thinking blu-ray gives the ps3 the ability to use 50 gig of space but with only a 9mb/s data rate with compression could u not transfer more data threw compression with minimal system impact?