From: Harry Ohlsen <harryo@...>
Date: 2004-02-07T07:46:33+09:00
Subject: Re: Is there any way to mark an object as "always in use" (specifically, in a C extension)?

Ralf Horstmann wrote:

>Have you already tried xmlparser (wrapper around
>expat)?
>
Back when I originally wrote it, I didn't have control of the box and 
hence couldn't get expat installed easily, so I didn't look any further 
at the time.  However, I might give it a go by installing it in my own 
account.  I also didn't have a lot of time to get this up and running 
back then.

Since I already had some C code that did what I wanted (and nothing 
more), I figured it would be faster to wrap it ... plus, in the back of 
my mind, I'm sure I was thinking "what a great opportunity to learn how 
to do C extensions" :-).

Nobu's suggestion worked fine, although I've not benchmarked yet to see 
whether the change has made a significant difference ... this thing 
takes quite a while to run, so it's hard to tell unless you think to 
look at the clock, or print some timestamps out, which is what I'll do 
when I get back to work on Monday.

>It's quite fast. I use it for huge XML documents where
>rexml and nqxml are way too slow.
>  
>
Just out of interest, how large was your "huge".  Some of my documents 
are (literally) hundreds of megabytes.

The other point I should make is that this application has to be able to 
make fairly arbitrary changes to the DOM, like moving whole subtrees 
around, and the changes are user-defined, hence I can't even use some 
kind of smart housekeeping, so event driven won't work for me.

Cheers,

Harry O.