the last pieces problem; (2) the replacement of block level
TFT with a bit level TFT solution does not necessarily yield
better fairness; (3) the choke algorithm is fair and robust.
Their recommendation is that the rarest first strategy already
achieves excellent performance and there is no compelling
need for more complex strategies. They do observe some scope
for improvement in the choke algorithm. While this study
sheds light on the important properties of the choke algorithm,
however their measurement is from a single-peer view point
which cannot evaluate the dynamics of BitTorrent. Also, the
reasons behind the observed properties of the choke algorithm
are unclear.