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Java-Gaming.org > Game Development > Performance Tuning > System.arraycopy
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Offline Absolution

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« on: 2002-12-06 07:15:42 »
Is System.arraycopy safe to use in your main loop (i.e. as it applies to GC)?
Offline Herkules

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« Reply #1 on: 2002-12-06 09:05:09 »
Does not get the question right.

System.arrayCopy() copies one array into another. This has nothing to do with GC.
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Offline leknor

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« Reply #2 on: 2002-12-07 11:35:18 »
Herkules: He's asking if System.arraycopy() creates garbage.

Absolution: My understanding is that arraycopy is intended to be used in performance critical code. So assume yes unless someone can proove me wrong.
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Offline Herkules

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« Reply #3 on: 2002-12-08 03:45:19 »
Quote
Herkules: He's asking if System.arraycopy() creates garbage.


Sure, got that, but why should copying an array produce garbage??
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Offline princec
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« Reply #4 on: 2002-12-08 06:05:16 »
Well, there's a lot of unexpected places where Java creates a few naughty objects. But this isn't one of them Smiley

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Offline Absolution

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« Reply #5 on: 2002-12-08 08:15:52 »
Thanks, that's helpful.  Does anybody know exactly how this method works?  Is it just doing a copy of the reference values in the src objects to those in the dest objects?  
Offline leknor

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« Reply #6 on: 2002-12-08 11:17:13 »
It does a shallow copy.
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