Outer broadcasting?

General Usage
6

Whoops, sorry, I missed that :slight_smile:

In that case, this seems like a great time for some metaprogramming! How does this look?

julia> @generated function outer(f, args::Tuple{Vararg{Any, N}}) where {N}
         expr = Expr(:call, :broadcast, :f)
         for i in 1:N
           if i == 1
             push!(expr.args, :(args[1]))
           else
             push!(expr.args, Expr(:call, :reshape, :(args[$i]), Expr(:tuple, [1 for _ in 1:i - 1]..., :(:))))
           end
         end
         expr
       end
outer (generic function with 1 method)

julia> @btime outer($f, ($x, $y, $z));
  108.493 ms (3 allocations: 457.76 MiB)
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