mozilla/rust — pull request #7934 by sfackler (2013-07-20 22:48:02+00:00)
Title: Eliminated SmallIntSet

SmallIntSet is equivalent to BitvSet but with 64 times the memory
overhead. There's no reason for it to exist.

SmallIntSet's overhead should really only be 8 times, but for some
reason, `sys::size_of::>() == 8`, not 1.