hadoop-common-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15033) Use java.util.zip.CRC32C for Java 9 and above
Date Wed, 10 Jan 2018 13:39:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15033?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16320245#comment-16320245
] 

ASF GitHub Bot commented on HADOOP-15033:
-----------------------------------------

Github user dchuyko commented on the issue:

    https://github.com/apache/hadoop/pull/291
  
    A copy of the patch from the pull request was attached as HADOOP-15033.010.patch in Jira.
The patch passed genericqa checks and shows same performance improvement a before. Please
review this latest version of pull request.


> Use java.util.zip.CRC32C for Java 9 and above
> ---------------------------------------------
>
>                 Key: HADOOP-15033
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15033
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: performance, util
>    Affects Versions: 3.0.0
>            Reporter: Dmitry Chuyko
>              Labels: Java9, common, jdk9
>         Attachments: HADOOP-15033.001.patch, HADOOP-15033.001.patch, HADOOP-15033.002.patch,
HADOOP-15033.003.patch, HADOOP-15033.003.patch, HADOOP-15033.004.patch, HADOOP-15033.005.diff,
HADOOP-15033.005.diff, HADOOP-15033.005.diff, HADOOP-15033.005.patch, HADOOP-15033.006.patch,
HADOOP-15033.007.patch, HADOOP-15033.007.patch, HADOOP-15033.008.patch, HADOOP-15033.009.patch,
HADOOP-15033.009.patch, HADOOP-15033.009.patch, HADOOP-15033.009.patch, HADOOP-15033.009.patch,
HADOOP-15033.009.patch, HADOOP-15033.009.patch, HADOOP-15033.010.patch
>
>
> java.util.zip.CRC32C implementation is available since Java 9.
> https://docs.oracle.com/javase/9/docs/api/java/util/zip/CRC32C.html
> Platform specific assembler intrinsics make it more effective than any pure Java implementation.
> Hadoop is compiled against Java 8 but class constructor may be accessible with method
handle on 9 to instances implementing Checksum in runtime.



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

---------------------------------------------------------------------
To unsubscribe, e-mail: common-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: common-issues-help@hadoop.apache.org


Mime
View raw message