GSoC 2019: Fast Import and Export

[LazyDodo]

@someonewithpc

I did some more preliminary benchmarks and got the following results for a suzanne with a level 6 subdiv applied:

Implementation	Time (size of resultant file)
Python	77.5 s (340mb)
C++ (without duplicates)	45.9 s (290mb)
C++ (with duplicates)	22.4 s (580mb)

These results aren’t quite as expected. This seems to be due to high amounts of indirection resulting from the use of boost, so the next planned step is to change the implementation to not depend on boost for this.

On win64 With L6 Applied suzanne

Implementation	Time (size of resultant file)
Python	123.8 s (340mb)
C++ (without duplicates)	27.2 s (299mb)
C++ (with duplicates)	47. s (600mb)

Seems fishy that I have opposite results for the with and without duplicates, you sure on those times?

Also when swapping out fstream for FILE*

Implementation	Time (size of resultant file)
C++ (without duplicates)	14.2 s (299mb)
C++ (with duplicates)	21.4 s (600mb)