[REBOL] Re: New competition: do you accept the challenge?! :-)
From: ale870::gmail at: 7-Nov-2007 0:36
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 this:
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,
etc...).
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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//Alessandro
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