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https://issues.apache.org/jira/browse/STORM-1650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15208626#comment-15208626
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ASF GitHub Bot commented on STORM-1650:
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Github user hustfxj commented on the pull request:
https://github.com/apache/storm/pull/1250#issuecomment-200402469
@revans2 ThreadLocalRandom is 20% faster than XORShiftRandom. But
ThreadLocalRandom is static. Yes, we can't use XORShiftRandom in
executor.clj due to thread safety now. But if we assure every spout/bolt thread
has itself XORShiftRandom object. Thus we can.
> 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.'''
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