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https://issues.apache.org/jira/browse/AVRO-183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12881017#action_12881017
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John Yu commented on AVRO-183:
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Hi Doug,
Thanks for the reply. There are two ways of implementing this feature. First,
when call function sizeof, i create an empty OutputStream, write to it and
count how many bytes in it. Second, implement a recursive call of sizeof, for
instance, sizeof(array) = sum of sizeof(element).
Solution 1 only needs a few lines to implement while there are some performance
issues in it. Solution 2 requires relatively big changes to existing code base
but have better performance( Because sizeof a byte array only return an
integer).
Which one do you think is better?
> add DatumWriter#sizeOf method that computes the number of bytes an object
> will be serialized as
> -----------------------------------------------------------------------------------------------
>
> Key: AVRO-183
> URL: https://issues.apache.org/jira/browse/AVRO-183
> Project: Avro
> Issue Type: New Feature
> Components: java
> Reporter: Doug Cutting
> Assignee: John Yu
>
> Sometimes it is useful to know how large an object will be when serialized
> before it is in fact serialized.
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