In some cases, it is useful to know how fast a ByteString is being
 consumed. Typically, this could be to report some measure of progress
 to a waiting user, but it could also be to perform some form of testing
 on input / consumption code.
 .
 This package provides a library for the Haskell programming language, compiled
 for profiling. See http://www.haskell.org/ for more information on Haskell.