Hello everyone! I'm currently embedding Python and have a problem. I have a struct (point) which looks like struct TPoint { int x, y; }; And I want it to be usable from Python. I made it in two ways: the first one was writing all the warpping by myself according to Python/C API, and the second was wrap it with Boost.Python. So it looks like class_<TPoint>("TPoint") .def_readwrite("x", &TPoint::x) .def_readwrite("y", &TPoint::y); It wraps ok but here is a problem: I create a huge (1000000 items) list of objects of that type: def cr_fig(n): res = [] while n>0: res.append(TPoint()) n -= 1 return res And then when I use a simple function which just increments the x member of every object, this function takes about 4 seconds to process the whole list (1000000 items) of Boost-wrapped objects and less than a second to process objects of my own wrapping! How this can be possible? Is Boost.Python much more slower than Python itself? Regards, Artyom Chirkov. P.S. I couldn't find out how to write to Boost.Python community, so I wrote here. If anyone knows how to do that, please let me know!