[antlr-interest] Re: Local lookahead depth
lgcraymer
lgc at mail1.jpl.nasa.gov
Mon Nov 10 01:21:16 PST 2003
--- In antlr-interest at yahoogroups.com, "Oliver Zeigermann"
<oliver at z...> wrote:
> > > because of the memory issue. As a very practical exmaple I
have
> > parsing
> > > of the AMM (Aircraft Maintenance Manual) which is available in
> > SGML
> > > (very hard to parse, really). I parsed this a few years using
> > ANTLR, but
> > > its size normally is around 100MB. A few years ago my machine
had
> > 128MB
> > > of RAM! You see what I mean?
> >
> > And how much disk space did you have? On a UNIX box, mmap() is
a
> > good way of automating file I/O, but even on systems without
virtual
> > memory, you can fake it. Performance is not an issue--with a
problem
> > of this size, nothing stays in the processor cache, and the
overhead
> > of the disk writes will be only a few percent.
> >
> > --Loring
>
>
> Loring,
>
> are you really serious about this? Have a look at the DOM vs. SAX
> discussion in the XML area...
Of course. Large memory machines are a recent luxury, and it is not
hard to use disks efficiently.
--Loring
> Oliver
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