lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Adrien Grand (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-4536) Make PackedInts byte-aligned?
Date Mon, 05 Nov 2012 13:34:13 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-4536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Adrien Grand updated LUCENE-4536:
---------------------------------

    Attachment: LUCENE-4536.patch

Patch. I added a test so that two assumptions that were made by callers are still true, even
if you are reading packed ints streams generated with 4.0 with this patch applied:
 - after reading all values of a Readeriterator, the IndexInput is positioned at the end of
the stream,
 - after reading the last value of a direct Reader, the IndexInput is positioned at the end
of the stream.
                
> Make PackedInts byte-aligned?
> -----------------------------
>
>                 Key: LUCENE-4536
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4536
>             Project: Lucene - Core
>          Issue Type: Task
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Minor
>             Fix For: 4.1
>
>         Attachments: LUCENE-4536.patch
>
>
> PackedInts are more and more used to save/restore small arrays, but given that they are
long-aligned, up to 63 bits are wasted per array. We should try to make PackedInts storage
byte-aligned so that only 7 bits are wasted in the worst case.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

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


Mime
View raw message