Re: [Pyparsing] Is it possible to optimize this grammar?

[Gustavo N. <me...@gu...>]

What!? I'd call this "Mega Turbo Button", not just packrat. ;-)

"W == 0   |   (X != 1   ^   (Y > 2   &   Z < 3))" is parsed without packrat in 
676.20 seconds. With packrat, it's parsed in 0.02 seconds! 33810x faster!

And the best of all is that all my 500+ tests still pass. Now the test suite 
is run in just 1.53 seconds!

This is just awesome. Thank you very much, Paul!

  - Gustavo.


Paul said:
> Parsers that have deep operatorPrecedence definitions often benefit from
> using packrat parsing.  Please insert this at the top of your module, right
> after the import statement (you'll also have to add ParserElement to the
> list of names imported from the pyparsing module):
>
> ParserElement.enablePackrat()
>
>
> Packrat parsing is a kind of parse-time memoization.  There is more info on
> the FAQs page of the wiki.
-- 
Gustavo Narea <xri://=Gustavo>.
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