The question about lambda's performance
=?GB2312?B?zuLosdSo?=
wupuyuan at gmail.com
Mon Feb 20 18:57:55 PST 2012
Thx for your reply , are there some blogs or doces about the plan and so on
?
2012/2/21 Brian Goetz <brian.goetz at oracle.com>
> Thanks for trying out the implementation!
>
> We are still very much in the prototype stage of the development of the
> implementation. Currently the compiler generates inner classes, but that
> is definitely a temporary strategy. Our focus has been exclusively on
> delivering something that works, so people can try it out. Many shortcuts
> have been taken to get something in people's hands as early as possible, so
> that we could get feedback on the usability of the features.
>
> Any conclusions drawn from performance measurements at this time would
> definitely be premature.
>
>
>
> On 2/20/2012 8:33 PM, Îâè±Ô¨ wrote:
>
>> Hi, I'm from china and take care of lamdba project these days.
>>
>> I'm sorry for last mail is not whole... so I send again.
>>
>> I read the doc of
>> http://cr.openjdk.java.net/~**briangoetz/lambda/lambda-**state-4.html<http://cr.openjdk.java.net/~briangoetz/lambda/lambda-state-4.html>very
>> carefully, the lambda spec is so simple, but there is a question about
>> performance.
>>
>> In section 1 background , we get the information that the "callback
>> interface" nearly can not increase the performance by multicore cpu or
>> parallel-programming. But there is no info in the follow part about the
>> target of lambda. Is there some improvement of JVM about this?
>>
>> I test the "javap -c" to the classes , there are no "invokedynamic"
>> created, and test the cost time of inner classes and lambda ,it seems
>> lambda codes cost a little more time.
>>
>> Thx resd my question! If there are any unclear because my pool English
>> please note me!
>> B&R
>>
>>
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