The speed issue is a little more complex than it seems at first and depends on cpu/disk speeds, but with a modern system compressed will probably load faster because the slowest part of loading is transfering from hard disk to memory and the files compress well.

Something that you might consider is what else you do with the files.  If you edit the files, you will have to uncompress, edit, and recompress.  Also some utilities don't always work with compressed files.

 

Bill

 

People that know everything by definition can not learn anything