Re: NSKeyedArchiver - better ways to autosave documents?
Re: NSKeyedArchiver - better ways to autosave documents?
- Subject: Re: NSKeyedArchiver - better ways to autosave documents?
- From: Will Mason <email@hidden>
- Date: Tue, 30 Aug 2005 22:21:15 -0700 (PDT)
Yeah, sorry I couldn't be more helpful. Believe me, I'm as frustrated
by NSKeyedArchiver as anyone who uses would be. I've filed bugs against
it, but there has not been any response so far.
Shot in the dark: I've never used CoreData, but that might be a better
way to go. After all, they're obviously putting a great deal of effort
into it while not putting any discernible effort into keyed archives.
Maybe you should check it out.
Just a thought,
Will
--- Keith Blount <email@hidden> wrote:
> Thanks for the reply - I think I saw a post from you
> in the past on this, I guess you had the same
> problem... Trouble is, as you say, NSArchiver has been
> deprecated since 10.2 (and it's more awkward to
> maintain compatibility between program versions).
>
> There must be a solution to this that I am missing, as
> a number of programs auto-save without such a
> performance hit. At the moment, I save my Xcode-esque
> interfaced program whenever a new file or virtual
> folder is added or when a document is dragged and
> dropped to a new position in the outline view. When
> there are 500 or so files or folders, there is a pause
> of a few seconds while waiting for the file to save in
> these situations, which is not pretty.
>
> (I don't want the user to have to manually save, as it
> makes more sense for save to affect only the
> currently-selected file in the editor.)
>
> If anyone has a better way of approaching this, I
> would be very grateful.
>
> Many thanks,
> Keith
>
> P.S. Apologies for the post title-change, but I
> figured the new post title better reflects the
> question.
>
> ---
>
> FROM : Will Mason
> DATE : Tue Aug 30 14:55:16 2005
>
> NSArchiver performs significantly better than
> NSKeyedArchiver - in some
> of my tests more than 100 times better. I've always
> just been annoyed
> by NSKeyedArchiver, since sometimes it feels like I
> can type binary
> numbers faster than it can write them.
>
> Good luck, especially after NSArchiver becomes fully
> deprecated,
> Will
>
> --- Keith Blount <<email_removed>> wrote:
>
> > Hello,
> >
> > This is a question that has been asked before, I
> know,
> > but my searches of the archives and CocoaDev have
> only
> > found lots of questions and no real solution...
> >
> > I have an app that works a little like Xcode: it has
> > an outline view that represents virtual folders and
> > text files. Whenever the user adds a new text file,
> it
> > is saved within the document's file wrapper as an
> RTFD
> > file, and the contents of the outine view (an array
> of
> > root-level node model objects, each of which keep an
> > array of children) is saved to disk using
> > NSKeyedArchiver. This way, the project is auto-saved
> > each time a document is added.
> >
> > The problem is that - as has been noted a number of
> > times - NSKeyedArchiver is *slow*. Once I have about
> > 700 odd files in my project, if I click my "add
> > document" button, it takes a few seconds to respond
> -
> > because NSKeyedArchiver is taking so long to save
> all
> > the data to disk.
> >
> > Is there a better way to do go about this that will
> be
> > faster? My model object mostly contains strings and
> > ints, but it also contains an NSImage, so isn't
> really
> > suitable for property list serialization (I think -
> > though I was left baffled by the documentation on
> > property list serialization, I fully admit).
> >
> > Many thanks in advance for any suggestions,
> > Keith
> >
> >
> >
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