if the obj object has more than 1000k vertices,use the build-in obj importer will be very slow sometimes take half an hour since it is written with python.
I written this OBJ importer using C++ code.it is much faster than the python implement.
although it not be optimized with code. I will continue improve the speed of import in the next version.
there is no exporter currently , but will make it.
import 10000k face obj takes about 1 minutes(7 time faster than the build -in importer)
OBJ importer for (blender 2.81 for windows x64 only)
IMDJS_io_obj C (20191221_).zip (375.8 KB)
update 20191205 Fix known bugs
update 20191206 shorten half of the import time compare to the previous version
update 20191208 fix the bug of edge can’t be seen
update 20191213 Improve the speed of importing
if you have inlstalled this addon , to update, just need to replace this obj_IO64.dll file,no need to reinstall again.