Just to let you know, I do not see the same behavior (I have cleaned up the code and added the header files). Here is the compilation command and output I get:
g++ test.cpp -otest -lboost_serialization ./test serialize: 0.11 serialize: 0.12 serialize: 0.11 serialize: 0.11 serialize: 0.12 serialize: 0.11 serialize: 0.12 serialize: 0.11 serialize: 0.12 ...
/// BEGIN file: test.cpp
#include <fstream>
#include <iostream>
#include <vector>
#include <boost/archive/binary_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/serialization/vector.hpp>
#include <boost/timer.hpp>
using namespace std;
using namespace boost;
class NODE
{
public:
NODE(){}
NODE* add(NODE* node)
{
children.push_back(node);
return node;
}
~NODE()
{
vector<NODE*>::const_iterator it;
for(it = children.begin();
it != children.end();
++it)
{
delete *it;
}
}
vector<NODE*> children;
private:
friend class serialization::access;
template <typename Archive>
void serialize(Archive &ar, const unsigned int version)
{
ar & children;
}
};
void save(NODE* main)
{
ofstream stream("archive.tmp", ios::binary);
archive::binary_oarchive oa(stream, archive::no_header);
oa << main;
}
int main()
{
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<100; i++)
{
t.restart();
save(main);
cout<<"serialize: "<