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Re: Memory Overhead

From: Vadim Plessky <lucy-ples@mtu-net.ru>
Date: Wed, 12 Sep 2001 11:11:24 +0000
To: Razvan Costea-Barlutiu <cbrazvan@baltan.bsd.uchicago.edu>, www-dom@w3.org
Message-Id: <20010912070829.A5D6A7544@mtu.ru>
On Monday 10 September 2001 15:48, Razvan Costea-Barlutiu wrote:
|   I read at some point some reference about the DOM level 1 specification,
|   saying that a DOM heirarchy might take up to 4 times as much memory than
|   the file it was loaded from, depending on the implementation. I
| completelly agree with that.
|
|   I made an implementation for DOM level 2 (without the events part, which
|   actually is the real breakthrough of DOM 2) and i begin stress-testing it
|   on a 1.7 MB file containing some 230.000 entries (I just copied and
| pasted the contents of the file, almost choking at some point XMLSpy, after
| i moved to mighty... Notepad).
|
|   Anyway, these entries "eat" about 50 MB of memory which i find pretty
|   scaring, for a 1.7 MB file. I searhed my code for memory leaks or
|   over-allocations, but found none.

Any chance that you can put this 1.7MB file somewhere online (better - 
zip'ed) so we can test with different browsers?
Konqueror (www.konqueror.org) has very good DOM-, CSS2- based "KHTML" engine, 
and I can't say I have ever seen such (50mb) memory usage with it. ( I tested 
it on a 1.8MB bug archive file from bugs.kde.org, everything was fine)
But of course it can vary depending on file structure.
Anyway, I am ready to test with Konqi your file, and tell you what exactly 
memory usage was.

|
|   __________________________________________________________________
|   Razvan Costea-Barlutiu
|   Department of Radiology,
|   The University of Chicago
|   5841 South Maryland Avenue
|   Chicago, Illinois 60637
|   Phone: (773)834-5106
|   E-Mail: cbrazvan@baltan.bsd.uchicago.edu

-- 

Vadim Plessky
http://kde2.newmail.ru  (English)
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Received on Wednesday, 12 September 2001 03:08:40 GMT

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