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https://issues.apache.org/jira/browse/AVRO-278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12796572#action_12796572
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Philip Zeyliger commented on AVRO-278:
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Kevin,
Your belief is correct. This patch doesn't affect the serialized format at
all. It's merely changing the how those objects are represented in memory.
It's also changing the API a bit, though I doubt you'll run into that.
-- Philip
> use array instead of map to implement generic records
> -----------------------------------------------------
>
> Key: AVRO-278
> URL: https://issues.apache.org/jira/browse/AVRO-278
> Project: Avro
> Issue Type: Improvement
> Components: java
> Reporter: Doug Cutting
> Fix For: 1.3.0
>
> Attachments: AVRO-278.patch
>
>
> It would be considerably faster to implement GenericData.Record as an array
> rather than as a HashMap. We expect generic data to be a major incentive to
> using Avro, and users of Java's generic API should not pay a performance
> penalty.
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