Parallel support?

[V-Z]

I wonder if there could be any way to parallelize computing of the distances. This would be extremely useful especially for large data sets. Just a small enhancement suggestion. :-)

[HajkD]

Sure :) This is on my agenda and I will try to get this done once I have a longer stretch of time for coding. Do you have any suggestion on how to best approach this or is this only a general feature request?

[V-Z]

Cool :-) My experience with Rcpp/C++ is exactly zero, so I'm not sure how helpful I can be here... :-( I always did all my needed parallelization with the parallel package - parLapply and relatives. This use to be straightforward, but doesn't work on Windows (I'm Linux-only). If I look at Your code correctly, I think it should be possible to rewrite the for loop(s) in DistMatrixNoUnit.R using parLapply or so.

[HajkD]

Perfect, I will look into this!

[fedemolina]

Hello! Here is an example of parallelizing the calculation of distances between matrices with c ++ using RcppParallel https://gallery.rcpp.org/articles/parallel-distance-matrix/

[HajkD]

Hi Federico,

Very cool! Thank you very much for sharing this!

I hope I can find some developer time in the near future to get this implemented.

Many thanks,
Hajk

[fedemolina]

I started learning c ++ very recently, maybe (if you agree) I could try to implement some distances to practice c ++. I am not an expert by any means and I don't have much time, but I could give it a try.

[HajkD]

Sure! Having some working examples would be great. I would also look over the code and there is no rush!

Thank you very much for your help with this!

Cheers,
Hajk