[antlr-interest] C++ is slower than Java?

Ruslan Zasukhin sunshine at public.kherson.ua
Sun Feb 24 09:40:28 PST 2002

on 2/24/02 15:23, keren_jefet at keren_jefet at yahoo.com wrote:

> Hi,
> I have tested the java.g example both on Java-generated parser, and
> on Cpp-generated parser (antlr-2.7.1, buildAST=true).
> Surprisingly, I found out that the Java parser, was significantly
> faster than the Cpp one, especially when handling long java source
> files. (sometimes even 600% faster...)
> How can that be? 
> Is this related to the specific java.g grammar definitions, or maybe
> it is true for all parsers, no matter of the grammar complexity?

Sounds incredibly!

I think you need contact Ric (main developer of C++ branch) and send to him
your C++ and Java projects. So Ric will be able to see self speed

May be Ric will be able profile and find bad code in C++ part.

Best regards,
Ruslan Zasukhin


e-mail: ruslan at paradigmasoft.com
web   : http://www.paradigmasoft.com

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