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https://issues.apache.org/jira/browse/CASSANDRA-1232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12884179#action_12884179
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Jonathan Ellis commented on CASSANDRA-1232:
-------------------------------------------
also backported to 0.6
> UTF8Type.compare() is slow and dangerous
> ----------------------------------------
>
> Key: CASSANDRA-1232
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1232
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Folke Behrens
> Assignee: Nick Bailey
> Fix For: 0.6.4
>
> Attachments:
> 0001-Fixes-to-UTF8Type-compare-and-getString-methods.patch
>
>
> UTF8Type converts both byte arrays into Strings and then compares them. This
> is unnecessary and slow because UTF-8 encoded Strings are already directly
> comparable. Higher codepoints yield higher initial and subsequent bytes. One
> can safely use BytesType.compare() for UTF-8. Maybe UTF8Type should be a
> subclass only overriding getString().
> BTW, It's also dangerous to ignore invalid byte sequences. At this point the
> byte array should contain valid UTF-8.
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