[gdal-dev] gdal_translate (3.1.0dev) "never" finishes on large jpeg cogs... REALLLLLY long time to unload.

[Even Rouault]

Andrew,

Has your source raster an alpha band ? That could explain the difference 
since it isn't possible to directly create a YCbCrA JPEG compressed file, but 
internally a mask band must be created. However I wouldn't anticipate such 
a huge difference in performance between compression schemes. I would 
suggest not setting GDAL_CACHEMAX at all and letting it at its 5% default 
(increasing it is not always a good idea), in case it would be a performance 
issue at de-allocating cached blocks. 

Even

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