[GRASS-dev] [GRASS GIS] #2466: r.param.scale slow on Windows when there is no data in raster

[GRASS GIS]

#2466: r.param.scale slow on Windows when there is no data in raster
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 Reporter:  annakrat            |       Owner:  grass-dev@…              
     Type:  defect              |      Status:  new                      
 Priority:  normal              |   Milestone:  7.0.0                    
Component:  Raster              |     Version:  unspecified              
 Keywords:  r.param.scale, nan  |    Platform:  MSWindows 8              
      Cpu:  Unspecified         |  
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 When I run r.param.scale on Windows with raster map with a lot of no data,
 the computation is significantly slower (90 s on Ubuntu, 50 min on
 Windows). r.param.scale doesn't propagate nulls. I read somewhere that
 computing with nan can be slower on some architectures, could this be the
 reason?

 I attached a patch to propagate nans. I also realized that at one point
 during preprocessing, there are large numbers computed (especially with
 big cell size and high window size), so I thought double would be more
 appropriate.

 If there are no objection, I would commit it to test it on Windows.

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Ticket URL: <http://trac.osgeo.org/grass/ticket/2466>
GRASS GIS <http://grass.osgeo.org>