Re‐working of two standard moment‐method codes for execution on parallel processors

Two separate exercises on a similar theme are reported. In the first, the moment‐method program NEC was extensively modified in order to optimize its performance on a four‐processor Cray X‐MP computer. In the second exercise, the MININEC moment‐method program was completely rewritten into the occam programming language so that it could be executed directly by a transputer system. The NEC exercise exploited judicious use of vectorization and alternative parallelization techniques and achieved a reduction of run times by factors of about five or more. The MININEC exercise has so far achieved only a modest reduction in run‐time but it has the potential for a much greater improvement if an optimum strategy for configuring the transputer network is implemented.