Performance problems with jdk 1.5 on Linux plattform

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#420

From: Welf Wustlich
Date: Mon, 15 Aug 2005 13:48

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Performance problems with jdk 1.5 on Linux plattform
(not tested on Windows, might be the same)

After refactoring using the new features from java 1.5 I lost
performance significantly:


public Vector<unit> units;

The new code:
         for (unit u: units) u.accumulate();

runs more than 30% slower than the old code:
         for (int i = 0; i < units.size(); i++) 
units.elementAt(i).accumulate();

I expected the opposite.
Is there any information available that helps?

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