[
https://issues.apache.org/jira/browse/HADOOP-9601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13668487#comment-13668487
]
Gopal V commented on HADOOP-9601:
---------------------------------
+1 to the idea.
I attempted something like this before, but was messing with the java array
base offsets which was horribly implementation specific.
It worked, but GetPrimitiveArrayCritical() looks a lot more safe & possibly
portable between impls.
> Support native CRC on byte arrays
> ---------------------------------
>
> Key: HADOOP-9601
> URL: https://issues.apache.org/jira/browse/HADOOP-9601
> Project: Hadoop Common
> Issue Type: Improvement
> Components: performance, util
> Affects Versions: 3.0.0
> Reporter: Todd Lipcon
>
> When we first implemented the Native CRC code, we only did so for direct byte
> buffers, because these correspond directly to native heap memory and thus
> make it easy to access via JNI. We'd generally assumed that accessing byte[]
> arrays from JNI was not efficient enough, but now that I know more about JNI
> I don't think that's true -- we just need to make sure that the critical
> sections where we lock the buffers are short.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
