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https://issues.apache.org/jira/browse/THRIFT-446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12760763#action_12760763
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David Reiss commented on THRIFT-446:
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Seems sensible. I can think of a few complications. First, you might need the
mask to be recursive, since you might want to filter sub-objects. Second, you
would have to be sure that you used the same protocol for writing that you did
for reading if you want to just forward the serialized data on. I don't think
that requires a new protocol interface, though.
proto.getTransport().write(saved_data). isset becomes a tr-state: set, unset,
set-but-serialized. Third, skipping over nontrivial requires a nontrivial
amount of CPU. Less than full deserialization, obviously, but nontrivial.
> Partial deserialization
> -----------------------
>
> Key: THRIFT-446
> URL: https://issues.apache.org/jira/browse/THRIFT-446
> Project: Thrift
> Issue Type: New Feature
> Reporter: Bryan Duxbury
> Assignee: Mohammad Shahangian
> Priority: Minor
>
> There are some use cases where you might have a fair amount of serialized
> data coming to you, but you're only interested in specific fields from that
> data. The way it works now, you are stuck paying the price to deserialize
> that extra data no matter what.
> In the simplest approach, it would be nice if you could specify some sort of
> mask to use to suppress the deserialization of a given set of fields. A
> slightly more complex approach would be to not just skip the deserialization,
> but to actually hang on to the bytes that you didn't deserialize, so that
> when it came time to re-serialize, you could just rewrite the original data.
> Obviously this would imply some interesting interactions with the validation
> system and probably nontrivial changes elsewhere (isset, protocol interface,
> etc). However, it could yield a big performance benefit in specific
> applications.
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