intervals

The behaviour for printing a AnchoredInterval{Day(-1)} is:

julia> dt = DateTime(2016, 8, 11, 2)
2016-08-11T02:00:00

julia> AnchoredInterval{Day(-1)}(dt)
AnchoredInterval{Day(-1), DateTime, Open, Closed}(DateTime("2016-08-11T02:00:00"))

julia> print(ans)
(DE 2016-08-11 02:00:00]

And this style of print is available for AnchoredInterval{T(-1)} if T is Day, `Mont

x = sample(1000)
y = sample(1000)

sx = Set$new(x)
sy = Set$new(y)

microbenchmark::microbenchmark(
  setdiff(x, y),
  sx - sy,
  unit = "s"
)

Gives a mean time in seconds of:

setdiff(x,y) = 4.681405e-05
sx - sy = 1.639163e-02

A considerable difference. The additional bloat is due to a lot of checks that sort through the correct dispatch methods and use tricks for