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https://issues.apache.org/jira/browse/CASSANDRA-3434?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sylvain Lebresne updated CASSANDRA-3434:
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Attachment: 3434.patch
Patch attached that basically adds the FastBytesComparisons class from
HADOOP-7761 and uses it (we need the same variation from the guava code, i.e,
being able to compare from offsets). Quick microbenchmark do confirm it's much
faster, but I haven't really took the time to do proper Cassandra benchmark
with and without.
The patch also slightly changes the non-array-backed ByteBuffer case, because
at least on my machine it's slightly (but consistenly) faster than our previous
code.
> Explore using Guava (or guava inspired) faster bytes comparison
> ---------------------------------------------------------------
>
> Key: CASSANDRA-3434
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3434
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Sylvain Lebresne
> Priority: Minor
> Attachments: 3434.patch
>
>
> Guava uses un.misc.Unsafe to do a faster byte arrays comparison (on long at a
> time) as noted in HADOOP-7761.
> We should probably look into it.
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