[gdal-dev] gdalwarp and gdaladdo in multi-threaded mode

[Neumann, Andreas]

Hi, 

I noticed that in GDAL >2.0 some utilities and operations support
multi-threaded calculations, such as the gdalwarp utility. I tested it
and it seems to work well. I can see that multiple CPU cores are busy. 

Question 1: in gdalwarp there are at least two ways to tell that it
should use more than one CPU: 

-multi 

and 

-wo NUM_THREADS=ALL_CPUS or a nr of cores 

Are these two flags redudant? Is either one enough or should I specify
both? 

Question 2: can I also speed up the gdaladdo utility? 

Thank you for your replies! 

Andreas

  
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