Here is what I get with julia 1.0 on windows 10.
julia> @time using ApproxFun
30.295569 seconds (61.13 M allocations: 4.873 GiB, 3.71% gc time)
In Jupyter notebook
@time using ApproxFun
29.376509 seconds (61.04 M allocations: 4.867 GiB, 3.57% gc time)
I think the issue here is why so slow to load and huge allocations.