Type XXI knowledge in 1936

If the Kriegsmarine received the exact Type XXI design and production methods in 1936, how would that change future submarine and ASW designs in World War II?

Other navies would accelerate ASW work, while German success would still depend on production skill and several design iterations.

Early Type XXI knowledge would alarm other navies because foreign intelligence watched the Kriegsmarine closely. Germany could begin moving toward the design, but exact plans would not provide the manufacturing skill needed to build the boats effectively. Several iterations would still be required before production matured. Allied anti-submarine work would accelerate in response, including technologies that later led toward weapons such as Limbo.