[infinispan-dev] Avoid Collections.emptySet() / emptyMap() / emptyList

Sanne Grinovero sanne at infinispan.org
Fri Oct 19 18:45:03 EDT 2012


Hi Erik,
interesting, I'm sure several people will still use Java6 for a while
but wasn't expecting you did, as you can both carefully test your
environment and are aiming to top performance. There are several more
performance goodies in Java7... could you share why you're on 6 ?



On 19 October 2012 21:23, Erik Salter <an1310 at hotmail.com> wrote:
>
>
> From: infinispan-dev-bounces at lists.jboss.org
> [mailto:infinispan-dev-bounces at lists.jboss.org] On Behalf Of Dan Berindei
> Sent: Friday, October 19, 2012 3:55 PM
> To: infinispan -Dev List
> Subject: Re: [infinispan-dev] Avoid Collections.emptySet() / emptyMap() /
> emptyList
>
>
>
>
>
> On Fri, Oct 19, 2012 at 7:50 PM, Tristan Tarrant <ttarrant at redhat.com>
> wrote:
>
> On 10/19/2012 06:28 PM, Dan Berindei wrote:
>> Galder, what JDK are you using? OpenJDK 1.7 uses
>> EmptyIterator.EMPTY_ITERATOR since 2007:
>>
>>
>> http://hg.openjdk.java.net/jdk7/jdk7/jdk/annotate/37a05a11f281/src/share/classes/java/util/Collections.java
>>
>> I don't have JDK 1.6 sources on hand to check, but I don't think it's
>> worth optimizing for such an old version anyway.
>
> An old version which is probably in use in most production environments :)
>
>
> If they aren't ready to upgrade to JDK7, I doubt they're willing to upgrade
> to Infinispan 5.2 :)
>
> FYI, I’m using ISPN 5.2 on JDK6 (on a hacked up JBossESB container).  Plus
> who knows what wacky configurations you’re supporting on the JDG side.
>
>
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