lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (LUCENE-5760) Speed up BufferedIndexInput.randomAccessSlice
Date Fri, 13 Jun 2014 22:10:02 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-5760?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Muir resolved LUCENE-5760.
---------------------------------

       Resolution: Fixed
    Fix Version/s: 5.0
                   4.9

> Speed up BufferedIndexInput.randomAccessSlice
> ---------------------------------------------
>
>                 Key: LUCENE-5760
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5760
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Robert Muir
>             Fix For: 4.9, 5.0
>
>         Attachments: LUCENE-5760.patch
>
>
> Today this uses the default implementation, e.g. for readInt(pos):
> {code}
> @Override
> public int readInt(long pos) throws IOException {
>   slice.seek(pos);
>   return slice.readInt();
> }
> {code}
> But this causes the bounds to be checked twice. Just like we did for MMap, we can provide
a faster implementation that only checks once: yields ~30% speedup.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org


Mime
View raw message