[antlr-interest] Re: ANTLR vs FLEX/BISON: performance issues?

[Elias Biris]

Hi, 

thanks for this. It is the first reply I got :-)

I was thinking mainly whether the difference in performance in the
generated parser has any similarity to the difference in performance of
the lexer side (as far as I know from reading the FAQ at jguru there is
an issue of performance of the lexer when compared to flex generated
lexers).

Also I am interested in the issue of grammar inheritance: is that
feasible in pccts at all? Has anyone tried this with ANTLR?

Best regards,

Elias

On Mon, 2002-09-02 at 23:22, Robert Sherry wrote:
> Elias,
> 
>     I do not have any formal bench marks but, about 5 years ago, I bench
> marked an Antlr generated scanner against a Lex generated scanner. I found
> that the Antlr generated scanner ran at least as fast as the Lex generated
> scanner.
> 
> 
> 
>     In addition, I have used both Yacc/Lex and Antlr.  I personally believe
> the Antlr is the better tool.
> 
> In addition, it is better supported.
> 
> 
> 
> 
> 
> 
> Robert Sherry
> 
> ----- Original Message -----
> From: "Elias Biris" <user_sofia at biris.freeserve.co.uk>
> Newsgroups: comp.compilers
> Sent: Saturday, August 10, 2002 2:33 AM
> Subject: ANTLR vs FLEX/BISON: performance issues?
> 
> 
> > Hello,
> >
> >  I just discovered antlr and its earlier flavour, pccts.
> >
> >  I was wondering whether there is any published material, preferably with
> >  sample code, that atests for the performance characteristics of
> >  lexers/parsers generated by antlr (primarily, I am also interested in
> >  similar material for pccts, if there is any) vs the same lexer/parser as
> >  generated by flex and bison.
> >
> >  Has anyone got any idea where to find something like that? All tips and
> >  pointers will be gratefully appreciated :-)
> >
> >  Thanks
> >
> >  Elias Biris
> 
> 


 

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