cgal-discuss - [cgal-discuss] huge difference between running normal_estimation on Mac and Windows

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From: Yifei Li <>
To:
Subject: [cgal-discuss] huge difference between running normal_estimation on Mac and Windows
Date: Sat, 27 Aug 2011 11:26:31 -0400

Hi,

I compiled and ran examples/Point_set_processing_3/normal_estimation.cpp on Mac and Windows respectively, using sphere_20k.xyz as input data.

It ran very fast on Mac:

Normal estimation

Open data/sphere_20k.xyz for reading...

Reads file data/sphere_20k.xyz: 21000 points, 0.355177 seconds

Estimates Normals Direction by Jet Fitting (k=18)...

done: 2.02112 seconds, 2391 Mb allocated

Orients Normals with a Minimum Spanning Tree (k=18)...

done: 0.596141 seconds, 2401 Mb allocated

Write file test.pwn

However, on Windows, it got stuck in normal orientation (I waited at least 10 mins):

Normal estimation

Open ..\data\sphere_20k.xyz for reading...

Reads file ..\data\sphere_20k.xyz: 21000 points, 1.078 seconds

Estimates Normals Direction by Jet Fitting (k=18)...

done: 15.313 seconds, 5 Mb allocated

Orients Normals with a Minimum Spanning Tree (k=18)...

Any idea why there's such a huge difference?

P.S., The Windows machines is a virtual machine with 2GB memory

Yifei

[cgal-discuss] huge difference between running normal_estimation on Mac and Windows, Yifei Li, 08/27/2011
- [cgal-discuss] Re: huge difference between running normal_estimation on Mac and Windows, Yifei Li, 08/27/2011
  - Re: [cgal-discuss] Re: huge difference between running normal_estimation on Mac and Windows, Laurent Saboret, 08/29/2011