> Cool, looking forward to your patch =).

It will take some time to make a completed patch. I don't have much time *right* now. Wait for a few hours.

> Also, is there any chance you could provide a more detailed explanation of
> what's going on? This is just me being curious about how it all works
> under the hood...

When reading from the buffer bz2 does:

  result = buffer[:size]
  buffer = buffer[size:]  # copy a thousands bytes

zipfile does:

  result = buffer[offset:offset+size]
  offset += size  # buffer untouched