Build optimized dag registry to avoid trying to optimize the same dag twice.
Build optimized dag registry to avoid trying to optimize the same dag twice.

hewlettpackardlabs/opveclib,opveclib/opveclib,opveclib/opveclib,opveclib/opveclib,hewlettpackardlabs/opveclib,hewlettpackardlabs/opveclib