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   Re: [xml-dev] Eclipse: the new Emacs? (and the XML story)

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On Tue, Apr 06, 2004 at 08:01:42AM -0400, Mark Schmeets wrote:
> I have not tried xmlbuddy, but all of the xml editors I have tried, 
> including oXygen ( and the Win32 ones XMLSpy, XMLNotepad, etc. ) exhibit 
> this behavior. Using RAM at 10 to 12 times the size of the document on 
> disk. I have always assumed it was because the were using DOM's 
> internally, and that the
> DOM implementations were memory hogs. Any one have any wisdom to share here?

Have you tested how the density of tags to text affects this?

I remember that with SoftQuad Author/Editor (in SGML days), the
overhead per element was significant, but text averaged not so
much more than disk overhead.  Systems using 16-bit characters
internally to represent Unicode text will do slightly worse than
using twice as much memory as disk space for text that's mostly

For Java-based software, the JVM you use may also make a difference,
although my experience (mostly on Linux) has been that the non-Sun JVMs 
don't actually run much software I want to run.


Liam Quin, W3C XML Activity Lead, http://www.w3.org/People/Quin/


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