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Posted to issues@flink.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2015/09/23 12:26:04 UTC
[jira] [Commented] (FLINK-2743) Add new RNG based on XORShift
algorithm
[ https://issues.apache.org/jira/browse/FLINK-2743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14904315#comment-14904315 ]
ASF GitHub Bot commented on FLINK-2743:
---------------------------------------
GitHub user ChengXiangLi opened a pull request:
https://github.com/apache/flink/pull/1170
[FLINK-2743] Add XORShfitRandom and use it in RandomSamplers.
Implement the XORShfitRandom based on the XORShift algorithm, it shows 4.5X faster than `java.util.Random` in benchmark. And update all RandomSample implements to use XORShiftRandom.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ChengXiangLi/flink xorshiftrandom
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/1170.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1170
----
commit 6425b746aac7bab2a2102d7ea623155b83e12965
Author: chengxiang li <ch...@intel.com>
Date: 2015-09-23T10:08:06Z
[FLINK-2743] Add XORShfitRandom and use it in RandomSamplers.
----
> Add new RNG based on XORShift algorithm
> ---------------------------------------
>
> Key: FLINK-2743
> URL: https://issues.apache.org/jira/browse/FLINK-2743
> Project: Flink
> Issue Type: Improvement
> Components: Core
> Reporter: Chengxiang Li
> Assignee: Chengxiang Li
> Priority: Minor
>
> [XORShift algorithm|https://en.wikipedia.org/wiki/Xorshift] is an optimized algorithm for random number generator, implement a RNG based on it would help to improve the performance of operations where RNG is heavily used.
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