Subject:
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Re: News search function reactivated (was: News search function temporarily disabled)
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Newsgroups:
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lugnet.off-topic.geek
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Date:
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Wed, 3 Jan 2001 23:18:06 GMT
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Viewed:
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875 times
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In lugnet.off-topic.geek, Kevin Loch writes:
> > I like Java. But this really needed to be close to the metal and generate
> > code that would fit in the L1 cache for the non-memory-bus-bound portions
> > of the loops. The GNU C compiler is incredible.
> Aah, you definately couldn't have done that in Java.
I probably couldn't, no, but a very experienced Java programmer and a good
JVM machine could conceivably do better than C. (It's not unheard of for
Java to be faster than C for certain types of things.) The big hits would
probably be the JVM environment startup and the array boundary checking.
Anyway, ya, I wouldn't wanna try this sort of thing in Java...I'm much more
comfortable with C when it comes to this sort of metal grinding. :-)
> Of course the ability to declare a couple register variables helps too.
Well, any good C compiler these days actually ignores the 'register' keyword.
(Right?) The compiler does a better job of register allocation than a human
does (when it comes to assigning C variables to registers), especially on
modern superscalar pipelined CPU architectures.
--Todd
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