STL Plugin hung up at Importing Geometry

If I import with millimeters I notice that the extension get stuck trying to heal the geometry because faces start to go missing. I hacked the STL importer to skip the repair step if the imported object isn’t a solid and then it imported quickly again. But as I mentioned, it then has many errors:

Hi.

I happend to have same problem when importing large stl files. When stl file is very large computer will freeze for along time. Do you have any ideas if it is possible to cut loading time by importing stl file trough some third program like meshmixer or netfabb basic?

I’ve had good results using ‘Assimp’ to convert to dae before import…