Hi.,
i am very thankful for the insight provided by
couple of folks..but honestly, like my former buddy
mentioned, lets not start "religious war" here on this
mailing list....
This very definitely gave me some insight to what the
c++/java relation meant..
Thanks guys..
--- Ross Burton <[EMAIL PROTECTED]> wrote: > On 28
Jul 2001 17:00:19 +0100, Sergio Carvalho
> wrote:
> > > I am looking into improving the performance of
> c2
> > > for specific platforms..
> > >
> > > Following are the queries i have ... they might
> be
> > > silly...but any input is highly appreciated...
> > >
> > > 1. c2 uses the parser and xslt parser developed
> in
> > > java..
> > >
> > > 2. Is it possible to use platform specific c++
> version
> > > of them wrapped around java may be using jni /
> some
> > > other stuff.. Like the wrap arounds are used for
> java
> > > compilers..
> > >
> > > 3. Shouldnt it improve the performance of
> c2?(atleast
> > > if we know the target application platform)
>
> JNI is not a magic bullet, just because native code
> is being called
> doesn't mean that it will go faster for two reasons:
>
> 1. JITs like Sun's HotSpot will compile the entire
> XML parser to native
> code within a few minutes of use
> 2. There is substancial overhead with calling JNI
> functions.
>
> For anyone who doesn't believe that the overhead of
> JNI is that large,
> find a copy of "Java Platform Performance" - a book
> from Sun press.
> Section 9.3.2 is a case study on JNI - specifically
> java.math. In JDK
> 1.0-1.2 large portions of that library were native
> code written in C,
> but the code was getting very complex. For JDK 1.3
> the library was
> re-written in Java, and ended up faster - for some
> operations several
> hundred percent faster.
>
> Of course, feel free to do code this if you want -
> this may be an
> example where JNI is a Good Thing. But check the
> benchmarks for XML
> parsers first - IIRC Xalan-C is slower than Xalan-J.
> MSXML however, is
> very fast.
>
> Ross
>
>
>
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Thanks and have great day
srini
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