Re: [Pyparsing] Painfully slow parsing.

[Eike W. <eik...@gm...>]

On Monday 31 August 2009, John Krukoff wrote:
> I do say was, though, as I stumbled across this comment on the
> discussion board:
>
> http://pyparsing.wikispaces.com/message/view/home/13557997
>
> Which was an instance of someone else having a performance problem
> with pyparsing.indentedBlock. His solution worked for me, and
> didn't break any of my test suite. My parser still isn't speedy,
> but at least it's not ridiculous anymore (from 13 minutes to parse
> that test case down to about a tenth of a second). I patched
> indentedBlock as so:

That's an interesting find. I put the modification into my patched 
version of Pyparsing and it didn't break any tests in my project too. 

The modification also solves one problem where Pyparsing can't parse a 
complex but syntactically correct file. Without the modification the 
parser crashes with "RuntimeError: maximum recursion depth exceeded". 
So this modification seems to be quite usefull.

John, you should put a patch into Pyparsing's tracker, so that it 
doesn't get lost.
http://sourceforge.net/tracker/?atid=617313&group_id=97203&func=browse

Kind regards,
Eike.