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- Newsgroups: comp.sys.mac.misc
- Path: sparky!uunet!decwrl!csus.edu!netcom.com!strnlght
- From: strnlght@netcom.com (David Sternlight)
- Subject: Re: What's your opinion of SpaceSaver?
- Message-ID: <k2an!m.strnlght@netcom.com>
- Date: Tue, 25 Aug 92 20:04:45 GMT
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- References: <1992Aug25.114342.12269@miavx1.acs.muohio.edu>
- Lines: 64
-
-
- Peter Sweeney asks about Stuffit Space Saver vs. Auto Doubler. Doubtless
- others will be posting speed and size comparisons, so I'll confine
- my remarks to integration issues.
-
- It's best if one uses either Space Saver and the new Stuffit Deluxe
- 3.0 or AutoDoubler and DiskDoubler in tandem, for various "bailout"
- reasons if troubles arise with the space saving init/cdev (not enough
- memory to install, wanting to use space saved files on another machine
- with Stuffit/DiskDoubler but not the space saver extensions, etc.).
-
- Thus, other things being equal, the question can be re-examined as one
- of a preference between Stuffit Deluxe 3 and Disk Doubler. That
- question seems easy to answer at the current state of things. SD3 is
- faster than Disk Doubler, and produces comparably sized files, in my
- testing. Stuffit has many more options and much more flexibility.
- Stuffit and SD3-compatible files are at least an order of magnitude
- more common on bulletin boards and other sources for downloading
- files--at one point I think I recall the Disk Doubler people saying
- their product wasn't intended for communicating compressed programs.
- SD3 has a much more natural and user-friendly capability for managing
- an archive of many pieces--folders and files--as is common with
- sophisticated applications.
-
- SD3 comes with several useful drag-and-drop icons which will convert
- older Stuffit files, and Compact Pro files; which will compress or
- expand files. I find these extraordinarily useful, and I almost never
- invoke the main program itself.
-
- Finally, now that SD3 is performance-comparable to Compact Pro, those
- who feel a debt to Ray Lau for his original Stuffit, which started
- the whole thing, can "return to the fold" while preserving the
- efficiencies they like.
-
- (Historical note: Bill Goodman's Compact Pro was, for a long time,
- the space saving compression champion, so much so that the Disk
- Doubler people finally abandoned their own algorithm and bought
- his. That caused many, with regret, to switch from the Stuffit
- family to other products. Stuffit Deluxe 3.0 is now about equal
- in space saving to Compact Pro/Disk Doubler, and is faster and,
- I think, more convenient to use. Moreover, Compact Pro does not
- (yet?) have a disk space saving analogue to Space Saver or Auto
- Doubler; it is a file compression utility alone.)
-
- (Additional note: file compression utilities make files smaller. They
- were originally double-click launch applications. They are useful for
- archiving and electronic transmission of files. Disk space saving
- utilities are designed to save disk space, also by making files
- smaller, but not as much, since they are designed to expand files very
- rapidly as well, and thus use somewhat different methods. One rarely
- expands file compression-compressed files. One constantly expands disk
- space saved files, usually by double-click launch, since those files
- are intended to replace one's normal on-disk files. Thus the space
- saving algorithms have to treat such issues as expanding the file,
- running it, modifying it, and resaving it, all transparently so that
- the user doesn't need to know he's using a space saving algorithm. All
- the file compression algorithm has to deal with is making the file
- smaller and bigger.)
-
- Apologies to those who already know all this, but perhaps the detail
- is useful to some readers.
-
- David
-
-