[julia-users] Does annotating values with abstract data type help?

[cheng wang]

In `performance tips`, there is an example:
function foo(a::Array{Any,1})
    x = a[1]::Int32
    b = x+1
    ...
end
It say the annotation ::Int32 helps in this case.

So I was wondering if it still helps in the following case with abstract 
type annotation??
function foo(a::Array{Any,1})
    x = a[1]::Int
    b = x+1
    ...
end
Here the annotation is ::Int.

Thanks!