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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-1232) UTF8Type.compare() is slow and dangerous
Date Sat, 26 Jun 2010 21:37:51 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-1232?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-1232:
--------------------------------------

    Fix Version/s: 0.6.4

> 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
>             Fix For: 0.6.4
>
>
> 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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