Geometric Registration Evaluation code too slow

[XuyangBai]

Hi, When I try to use the code for Geometric Registration Evaluation, it seems the process is so slow, my ransacRt takes about 25 seconds or more for max trials equals 50000, and in Compute alignment percentage part it takes about 20 seconds each multiQueryKNNSearchImp. So the total time for one pair of registration will cost 1 minute or more and I have to wait many hours until all the pairs have been done. So I wonder is there any way to make the process faster? Or is there something wrong with my usage?

Thanks for the attention!