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by ajdecon
5556 days ago
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More correct (if less vivid): see Amdahl's Law. (http://en.wikipedia.org/wiki/Amdahls_law) Most activities can only be made partly parallel. The rest must be serial; that is, will depend on steps done before, and cannot be made faster by breaking it up for more workers. If a task is 90% parallelizable, and you multiply the number of workers by 9, you only get a speedup of 5. If you multiply the number of workers by 100... you still only get about 9 times faster. :-) |
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