[gdal-dev] How to improve gdal_rasterize perfomance?

[Frank Warmerdam]

Hermann Peifer wrote:
> Frank Warmerdam wrote:
>> This sounds like a heap of processing that needs to be done.
>>
>> You can increase the chunk size on which gdal_rasterize operates by
>> increasing the GDAL_CACHEMAX config option.  I would suggest sizing
>> it to be roughly 1/3 of your machine RAM.
>>
>> eg.
>>
>> gdal_rasterize --config GDAL_CACHEMAX 600 ...
>>
>> would be appropriate on a machine with 2GB of RAM.
>>
>> Beyond that I can't think of much that might help.  The above basically
>> reduces the number of passes needed through the vector data.  It is all
>> processed once for each chunk of the raster that is processed.
> 
> Thanks.
> 
> Could the performance be improved by optimizing my blank tif: e.g. 
> compressed or not, tiled or not?

Hermann,

Uncompressed will help a bit perhaps, but there is only one pass made
over the raster, and in large chunks, so it won't make much difference.

Best regards,
-- 
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