Add unrolled_mapcall function#26
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This PR adds a functional form of
Base.Cartesian.@ncallto UnrolledUtilities:unrolled_mapcall(f, op, itrs...), which is roughly equivalent toop(unrolled_map(f, itrs...)...). This function reduces compilation time by manually splatting the arguments ofopinto a function call instead of relying on the compiler to infer and inline the result ofCore._apply_iterate(Base.iterate, op, unrolled_map(f, itrs...)). @charleskawczynski's work in CliMA/ClimaCore.jl#2225 has shown that this change and the changes in #25 could allow us to reduce the latency of ClimaCore broadcast expressions.Note: This PR is split off from #25, so it currently includes both sets of changes. Once that PR is merged in, this one should be rebased.