Best practice for threading nested loops

New to Julia
1

I was previously using Threads on a nested loop as follows

Threads.@threads for (aₓ, bₓ) in collect(Iterators.product(1:N.A, 1:N.B))
   ...
end

This works, but collect(Iterators.product(1:N.A, 1:N.B)) is allocating. I can instead do

LoopIndices = CartesianIndices((N.A, N.B))
Threads.@threads for abₓ in LoopIndices
    (aₓ, bₓ) = Tuple(LoopIndices[abₓ])
    ...
end

which is not allocating, but a bit cumbersome. Is there a better way to achieve this?

2

Do the patterns suggested in this recent blogpost help?