Image:Optimizing-different-parts.png

[edit] Explanation

Assume that a task has two independent parts, A and B. B takes roughly 25% of the time of the whole computation. By working very hard, one may be able to make this part 5 times faster, but this only reduces the time for the whole computation by a little. In contrast, one may need to perform less work to make part A be twice as fast. This will make the computation much faster than by optimizing part B, even though B got a bigger speed-up, (5x versus 2x).
(explanation taken from caption in wikipedia:Amdahl's law)

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[edit] Dettagli

from en.wikipedia Author= FedericoMenaQuintero

[edit] Licensing

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• Amdahl's law