On Aug 10, 2010, at 6:55 AM, Bill Bumgarner wrote: > > On Aug 10, 2010, at 1:31 AM, Alastair Houghton wrote: > >> Sounds like a bug to me. While zones are *discouraged* (they're very >> definitely an advanced topic and easily misused), I don't think they're >> actually deprecated. > > Their use is deprecated and should be documented as such. > > Zones were never very useful. They seemed like they might be, but proved to > be vastly more problematic than useful. > > (For those that don't know, the idea was to be able to create a zone for all > of, say, a document's objects. Then, when the document was closed, you > destroy the zone without destroying the individual objects.)
More significantly, per-document zones group all of a document's object allocations together, so that if I have four documents open but am only working on one of them, the OS can easily page out the memory associated with the three documents I'm not working on. I remember way back in the day when I updated to the first NeXTSTEP build that included zones, and suddenly my machine wasn't thrashing anymore. Zones were useful, but, as you say, problematic, because if you make a mistake like allocating just one object for document A in document B's zone, you lose the benefits. Best, __jayson Circus Ponies NoteBook - Organization for a Creative Mind www.circusponies.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
