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From "Doug Cutting (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AVRO-989) Java: Improve Builder performance in Specific API
Date Tue, 24 Jan 2012 21:44:48 GMT

    [ https://issues.apache.org/jira/browse/AVRO-989?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13192564#comment-13192564
] 

Doug Cutting commented on AVRO-989:
-----------------------------------

This looks good to me.  It will cause folks to have to re-generate their code when they upgrade
since the base class for generated code has changed incompatibly.  Should we hold it for 1.7.0
for that reason?

(I branch lazily.  I have not yet created a 1.6 branch since everything we've committed to
trunk so far is also destined for 1.6.  If we decide to hold this for 1.7.0 we could create
a 1.6 branch from trunk, then commit this to trunk.)
                
> Java:  Improve Builder performance in Specific API
> --------------------------------------------------
>
>                 Key: AVRO-989
>                 URL: https://issues.apache.org/jira/browse/AVRO-989
>             Project: Avro
>          Issue Type: Improvement
>          Components: java
>            Reporter: Scott Carey
>         Attachments: AVRO-989-v2.patch, AVRO-989.patch
>
>
> The Specific API generates Builder objects for each record.  This builder uses a boolean[]
to store flags for each field to indicate whether the field is set or not.
> This is not space efficient, a boolean[] takes 16 bytes plus one byte per field, rounded
up to the nearest 8 byte interval. 
> This can be improved on by using BitSet for large records, and bitmasks on an int for
records with less than 32 fields.

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