[antlr-interest] Re: BENCHMARK. ANTLR. Bad results.

[Ric Klaren]

On Sun, Nov 14, 2004 at 12:35:25AM +0300, Alex Sedow wrote:
> Little question. Why ANTLR still use buffering for source files? 

For C++ there's buffering in the stream interface (if you use the default
inputbuffers). And there's some internal buffering for syntactic predicates
in a cyclic buffer.

> I think modern computers and operating systems has enough physical or
> virtual memory to load full source file. Maybe better remove buffering and
> simplify logic?

In a sense a good point. But there's always some tension between features
and simplicity (and of course speed) ANTLR2 lexers pay dearly for some
features. Also keep in mind that ANTLR is used in a lot of varying
situations. For some buffering a whole file may be impossible. ANTLR2 does
not stop you from reading the whole file in advance, the parts to do that
are all there. See also my post in this thread about the ANTLR3 prototype
for C.

Cheers,

Ric
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