Gustafson定律

In computer architecture, Gustafson's law gives the speedup in the execution time of a task that theoretically gains from parallel computing, using a hypothetical run of the task on a single-core processor as the baseline. To put it another way, it is the theoretical slowdown of an already parallelized task if running on a serial processor. The law is named after computer scientist John L. Gustafson and his colleague Edwin H. Barsis, and was presented in the article Reevaluating Amdahl's Law in 1988.