cython generates horrible bint comparison code

[gfurnish]

Consider:

cdef bint foo
if foo == True:

This generates a raw rich compare

cdef bint foo
if foo==1:

This generates a C if statement. This minor problem causes a massive performance loss in inner loops.

[robertwb]

This has been resolved by  http://hg.cython.org/cython-devel/rev/e73528b0abee