many references to many objects - pybind11
6.03125
many references to a single object - pybind11
4.90625
many references to many objects - boost
4.453125
many references to a single object - boost
2.796875
many references to many objects - swig
15.6875
many references to a single object - swig
9.640625

generated file size comparison:
pybind11: 134kb
boost python: 162kb
swig : 47kb
