🚀 go-pugleaf

In article <1992Nov17.154210.7169@mail.cornell.edu> John T. Chapman <jtc1@cornell.edu> writes:

>>Hi, anyone can tell me the SpaceSaver coexist or cowork withautodoubler?
>
>Can't say for sure, as I've never used SpaceSaver, but my guess is no (or 
>at least, not happily.)

In my experience, they can without ill effect (other than a large system heap).
In fact, I think Aladdin even recommends this when switch from AD to SS.
(i.e., leave AD on, but with idle time compression off)


>Since both programs are designed to pass files more or less transparently 
>to everything else, best case scenario would be that one would be 
>constantly expanding stuff when the other one scans to compress. Of 
>course, they might actually be aware of each other... More likely, 
>though, is just nastiness, as they are both patching some fairly 
>low-level disk stuff and are likely to conflict...

Here's my guess/understanding as to why it's *not* a problem.  First of all,
both AD and SS undoubtedly skirt the toolbox when scanning the disk for
files to compress--so that they don't end up calling one another (or
themselves!) to expand a file.  Secondly, both should recognize that the
creator signature on files compress using the other are already compressed--
and they won't bother trying to re-compress them.  Finally, for all the
toolbox routines that they patch (and other software calls) one just
checks for the files it compressed first, and then the other checks second.
(SS probably checks first, since it loads last).


-- 
J. S. Greenfield                                         greeny@top.cis.syr.edu
(I like to put 'greeny' here, 
but my d*mn system wants a 
*real* name!)                        "What's the difference between an orange?"