Starts flying but after 2-3 minutes starts to get slow (from R status to D)

Team,
         this library is unique and cool, but has some problems dealing with long decompressions. I see a peak of excellent decompression at the start, and then degrades and CPU gets less and less used. Please take a look on your code, probably is some kind of throttling. Aside from this, please, could you document how to use blocksize parameter decompressing?

Thanks a lot!

Ramón