Re: Performance problems with jdk 1.5 on Linux plattform

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#422

From: Shankar Unni
Date: Mon, 15 Aug 2005 21:14

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Welf Wustlich wrote:

> public Vector<unit> units;

Using an arraylist helps slightly.

I got some fairly anomalous results comparing ArrayList and Vector: for 
the 1.5-style loops, ArrayList was faster then Vector, but for a loop 
with get() calls, Vector was faster. Vector was even faster than that 
using elementAt(), which was a surprise:

For a million summing iterations over a 100-element array:

vector elementAt loop took 3446 ms.
vector get loop took 3796 ms.
vector iterator loop took 5469 ms.
arraylist get loop took 4136 ms.
arraylist iterator loop took 4668 ms.

Really odd, and educational.

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