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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-420) Improve performance of BinaryMemtable sort phase
Date Fri, 04 Sep 2009 14:30:57 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12751475#action_12751475
] 

Jonathan Ellis commented on CASSANDRA-420:
------------------------------------------

Can you extend this to support the other partitioners as well?

Probably the easiest way is to make DK a (Token decoration, String key) tuple, since the different
Token subclasses already wrap the different decorations (BigInteger, byte[]).  May or may
not be worth special-casing OPP (whose StringToken is just a wrapper around the key in question)
to have null decoration.

> Improve performance of BinaryMemtable sort phase
> ------------------------------------------------
>
>                 Key: CASSANDRA-420
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-420
>             Project: Cassandra
>          Issue Type: Improvement
>    Affects Versions: 0.5
>            Reporter: Johan Oskarsson
>            Priority: Minor
>             Fix For: 0.5
>
>         Attachments: CASSANDRA-420.patch
>
>
> The BinaryMemtable sorts an array of decorated keys. There are a lot of string operations
and object allocation in the comparator that could be avoided to improve performance..

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