I would assume once you get out of the autoboxing caches the performance will 
get even worse. It really depends on the application, but I've found a number 
of spots where primitive collections work much better than autoboxing and JDK 
collections.

-bp


On Nov 2, 2010, at 11:25 AM, James Carman wrote:

> Yet another dependency to add to the mix.
> 
> On Tue, Nov 2, 2010 at 1:17 PM, Cogen, David - 1008 - MITLL
> <co...@ll.mit.edu> wrote:
>> 
>> ________________________________________
>> From: jcar...@carmanconsulting.com [jcar...@carmanconsulting.com] On Behalf 
>> Of James Carman [ja...@carmanconsulting.com]
>> 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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