One other datapoint - I ported flatbush to C++, and I got a 2.6x speedup on the "Insert 1 million boxes" benchmark. C++ port is at https://github.com/IMQS/flatb

One other datapoint - I ported flatbush to C++, and I got a 2.6x speedup on the "Insert 1 million boxes" benchmark. C++ port is at https://github.com/IMQS/flatbush https://github.com/IMQS/flatbush