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From "Benedict (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6934) Optimise Byte + CellName comparisons
Date Tue, 29 Apr 2014 11:36:16 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13984213#comment-13984213
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Benedict commented on CASSANDRA-6934:
-------------------------------------

As to benchmarks, CASSANDRA-6553 are the main ones I was using to justify this; see the green
line on [this graph|http://riptano.github.io/cassandra_performance/graph/graph.html?stats=6553.uber_contention_no_cache_CL_one_4_3.json&metric=op_rate&operation=counterread&smoothing=1&xmin=0&xmax=258.61&ymin=0&ymax=21794.3]

The downside of course is that these numbers are for simple sparse types only - I need to
update stress to support clustering columns (which I plan to do soon) to create more general
graphs for all of the optimisations.

> Optimise Byte + CellName comparisons
> ------------------------------------
>
>                 Key: CASSANDRA-6934
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6934
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Benedict
>            Assignee: Benedict
>              Labels: performance
>             Fix For: 2.1.0
>
>
> AbstractCompositeType is called a lot, so deserves some heavy optimisation. SimpleCellNameType
can be optimised easily, but should explore other potential optimisations.



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