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From "Cogen, David - 1008 - MITLL" <>
Subject RE: [Primitives] Does anyone use this?
Date Tue, 02 Nov 2010 17:17:34 GMT

From: [] On Behalf Of James Carman
Sent: Tuesday, November 02, 2010 12:30 PM
To: Commons Users List
Subject: Re: [Primitives] Does anyone use this?

Premature optimization with JDK5.  I'd say stick to the JDK classes if
you can and only try to beef up space/performance if you need to.

Normally I agree about evils of premature optimization. But ArrayListInt is practically a
drop-in replacement for ArrayList<Integer> and I see no reason not to use it if it is
supported and reliable.

My test of 2 billion accesses (reads and writes) ran in 35% of the time when I used ArrayListInt
vs. ArrayList<Integer>.
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