[REBOL] Re: New competition: do you accept the challenge?! :-)
From: ale870:gmai:l at: 7-Nov-2007 0:41
Sorry, I forgot another point that we could evaluate: now much memory is
used to perform a specific job. This is very important, since Java uses much
memory during the jobs.
On Nov 7, 2007 12:36 AM, Alessandro Manotti <ale870-gmail.com> wrote:
> Well Gregg,
> obviously we need to achieve the same result (else the comparison will
> fail!), but we need to optimize rebol program.
> Basically we need to maintain the program "logic" (loops, etc...).
> My target is not showing that java is faster than Rebol, but I'm trying to
> understand what are the "strong" points and "weak" points of Rebol.
> For example, until now, it seems Rebol does not manage very well strings
> (compared to Java). But we need to consider that java, in order to optimize
> string management, it introduced StringBuffer object, since String object is
> immutable, and is is very slow for frequent changes.
> I think Rebol could follow a similar way, using a specific datatype for
> strings that must be changed frequently.
> But this is a partial result.
> I didn't publish my benchmark about calculations, but I was very
> impressed: I made a similar loop, but I calculated a formula similar to
> result: result + 100 * sine i
> Rebol perfomance is very similar to java.
> Then I made a test for strings, since they are a "delicated" point in many
> languages (even more if we try to manage long strings, with MANY characters,
> since it involves good memory management, involves internal references,
> I think we could even create other specific tests in order to find weak
> points in Rebol, in order to try to optimize them, either as final script or
> as internal P-CODE.
> But we should not forget that Java is not pure P-CODE, since it includes a
> JIT (just in time compiler). In fact, Java interpreter machine automatically
> check the bottle neck and convert them in pure, native, machine language. I
> think Rebol works only in P-CODE and does not contain a real JIT.
> On Nov 7, 2007 12:23 AM, Gregg Irwin <gregg-pointillistic.com> wrote:
> > Hi Alessandro,
> > AM> So, my competion proposal is the following: creating a Rebol
> > application
> > AM> faster than the corresponding java one.
> > Is the goal just to create the same result, or just to optimize string
> > ops in loops?
> > -- Gregg
> > --
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