slow stream decompression

Hello,

I've followed the documentation and have compressed a 2GB file using the LZ4StreamCompressor with a page size of 1MB.

The compression speed is as expected, but when I use the LZ4StreamDecompressor I get very slow decompression speed. I've tried using a read-only mmap of the compressed file, and also loading the whole file in a bytes or bytearray object, but the speed is low in all cases at around 200KB/s (yes kilobytes)