优化器

unfold_contraction_generic_tuple(red_op, bin_op, reduced_vars, terms)

unfold_contraction_variadic(r, b, v, *ts)

optimize_contraction_variadic(r, b, v, *ts)

eager_contract_base(red_op, bin_op, reduced_vars, *terms)

optimize_contract_finitary_funsor(red_op, bin_op, reduced_vars, terms)

apply_optimizer(x)