[Boost-users] Performance of boost::serialization

Subject: [Boost-users] Performance of boost::serialization
From: Daniel Herb (physhh_at_[hidden])
Date: 2010-09-17 13:59:07

Hi!
I'm having performance issues with boost::serilaization. 
First a short description what my data looks like:
I serialize a container of boost::shared_ptr<Base> where i put polymorph
objects in (no very deep hierarchy ~2 layers). The objects are ~40 byte
each. The container has 100 elements in my test case.

In the test application i can only serialize that container ~40 times per
second. That's to slow for me because the data is used for the network
communication. 
What i've found is this thread:
http://old.nabble.com/-Serialization--Speedding-up-client-server-communication-td27462494.html
But it seems that i have to recreate the archive in my case because the data
can get send, changed and send again. The documentation says that this
behaviour can be disabled through disabling tracking. But that doesn't work
for me because I use pointers.

Robert Ramey also mentioned that implementing a lightweight version of
stringstream could improve the performance. I liked to look at that but it
seems that i'm missing something completely. 

class mystreambuf : public std::streambuf {
public:
    virtual std::streamsize xsputn(const char*_Ptr, std::streamsize _Count)
    {
    }
};

So this stream buffer does nothing right? But somehow serialization
throughput is even worse with that implementation (compared to
stringstream). I've never implemented a stream buffer so help would be nice.
What are the requirements of boost::serialization for the stream buffer?

Also generally it would be nice if you could share your oppinion if you
think if the performance of boost::serialization can be tuned to serialize
data for network communication. Is it only possible without
polymorphism/shared_ptr?

Any help is welcome!

Thanks
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