On Fri, Jul 30, 2010 at 3:47 AM, David <david.kum...@gmail.com> wrote:
> Hi all, I was finally able to write protocol buffers code over REST
> and did some comparison with XStream which we are currently uses.
> Everything seems great, only stumble with one thing.
>
> We have very large messages in one particular attributes, say
> something like this
>
> message Data {
> optional string datavalue=1;
> }
> Datavalue above are extremely huge text messages. Size is 512kb - 5
> Mb.
>
> Protocol buffers deserialize just fine, with superb performance
> comparing to XStream. However, I notice when I send this message to
> wire (via REST), it took longer to get response. Always twice longer
> than XStream. I am thinking this might come from serializing time.
>
It might be something to do with the utf8 serialization of the string.
There are two sets of byte arrays that need to be utf-encoded upon
serializing your message (costly especially for large strings like what you
have).
Try changing the field to ByteString. (optional bytes datavalue=1)
> From google documents, it says Protocol buffers is not designed to
> handle very large messages, although it can handle very large data
> set.
>
> I was wondering if anyone has some opinion or maybe solution from my
> case above?
>
> Thanks
>
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- David Yu
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