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bellockk / alphashape

Toolbox for constructing alpha shapes.
MIT License
258 stars 28 forks source link

100x slower on Ubuntu #15

Closed eric-burel closed 4 years ago

eric-burel commented 4 years ago

Also Numpy version: numpy==1.16.3

Description

Alphashape.alphashape is taking a few seconds to compute for an alpha hull of 0.1 and thousands of points. However, it seems around a hundred times faster on Windows.

I am working on a reproduction with clearer measurements, but in the meantime, do you have any tip what I could do to investigate the issue or what info I could provide to help?

Is there a specific computation that could provoke some slowness, eg some intensive computation that rely specifically on Numpy or any other 3rd party lib to be performant, or anything like that?

What I Expected

Same perfs on Windows and Linux

bellockk commented 4 years ago

Could you try profiling the code while running with your data set on both platforms? That might point to the code that is causing the difference in speed. Also, is there any chance you installed a numpy compiled with intel's mkl on windows and without on linux?

eric-burel commented 4 years ago

I think we solved an algorithmic issue in the code, and the issue disappeared. I do'nt have more info so I will close, I was the one experiencing the issue but not the actual coder so sorry I have only very partial information. Thanks for your feedback anyway!