[
https://issues.apache.org/jira/browse/STORM-1650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15208488#comment-15208488
]
ASF GitHub Bot commented on STORM-1650:
---------------------------------------
Github user revans2 commented on a diff in the pull request:
https://github.com/apache/storm/pull/1250#discussion_r57167482
--- Diff:
storm-core/src/jvm/org/apache/storm/transactional/TransactionalSpoutCoordinator.java
---
@@ -71,7 +72,7 @@ public ITransactionalSpout getSpout() {
@Override
public void open(Map conf, TopologyContext context,
SpoutOutputCollector collector) {
- _rand = new Random(Utils.secureRandomLong());
+ _rand = new XORShiftRandom(Utils.secureRandomLong());
--- End diff --
This should be fine it is only ever called from a single thread.
> improve performance by XORShiftRandom
> -------------------------------------
>
> Key: STORM-1650
> URL: https://issues.apache.org/jira/browse/STORM-1650
> Project: Apache Storm
> Issue Type: Improvement
> Reporter: John Fang
> Assignee: John Fang
>
> '''Implement a random number generator based on the XORShift algorithm
> discovered by George Marsaglia. This RNG is observed 4.5 times faster than
> {@link Random} in benchmark, with the cost that abandon thread-safety. So
> it's recommended to create a new {@link XORShiftRandom} for each thread.'''
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
