[Boost-users] Boost::serialization problem when use archive in a loop

20 Apr 2011


      I have a problem with serialization, and I do not know how to solve it. Time
to serialize the class a lot of growing when I do it in a loop. The first
iteration takes about 40 ms, for example, but any other takes about 400 ms.

class NODE
{
	public:
		
		NODE(){}

		NODE* add(NODE* node)
		{
			children.push_back(node);
			return node;
		}

		~NODE()
		{
			for(vector<NODE*>::const_iterator it = children.begin(); it !=
children.end(); ++it)
			{
				delete *it;
			}
		}

		vector<NODE*> children;

	private:
		friend class boost::serialization::access; 

		template <typename Archive> 
		void serialize(Archive &ar, const unsigned int version) 
		{ 
			ar & children;
		}
};

void save(NODE* main)
{
	std::ofstream stream("test", std::ios::binary); 
	boost::archive::binary_oarchive oa(stream, boost::archive::no_header);
	oa << main;
}

int main()
{
	boost::timer t;

	NODE* main(new NODE());

	for (int i=0; i<2000;i++) 
	{
		NODE* subnode = main->add( new NODE());
		for (int k=0; k<20; k++) subnode->add( new NODE());
	}
		for (int i=0; i<4; i++)
		{
			t.restart();
			save(main);
			cout<<"serialize: "<<t.elapsed()<<endl;
		}
	delete main;
        return 0;
}


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[Boost-users] Boost::serialization problem when use archive in a loop

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