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https://issues.apache.org/jira/browse/CASSANDRA-10322?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14747365#comment-14747365
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Benedict commented on CASSANDRA-10322:
--------------------------------------
For information, [this
graph|http://cstar.datastax.com/graph?stats=a63084c2-5c4e-11e5-9b80-42010af0688f&metric=op_rate&operation=3_user&smoothing=1&show_aggregates=true&xmin=0&xmax=174.24&ymin=0&ymax=110044]
demonstrates a useful bump from this patch (the purple line). Of course, still
not up to 2.2 speed, and 2.2 could also have the optimisation if we wanted to
backport it (which perhaps we should, so we have a good yardstick to continue
to measure from).
> skipBytes is used extensively, but is slow
> ------------------------------------------
>
> Key: CASSANDRA-10322
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10322
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Benedict
> Assignee: Benedict
> Priority: Trivial
> Fix For: 3.0.x
>
>
> We skip a great deal to avoid materializing data. Ironically, however,
> skipping is just as (perhaps more) expensive, as it allocates a temporary
> array of the size of the number of bytes we want to skip.
> This trivial patch implements {{skipBytes}} more efficiently, and simplifies
> {{FileUtils.skipBytesFully}}
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