File:Optimizing-different-parts.svg
Summary
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 <a href="https://en.wikipedia.org/wiki/Amdahl%27s_law" class="extiw" title="wikipedia:Amdahl's law">wikipedia:Amdahl's law</a>)
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:05, 22 December 2016 | | 500 × 250 (1 KB) | 127.0.0.1 (talk) | 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).<br> (explanation taken from caption in <a href="https://en.wikipedia.org/wiki/Amdahl%27s_law" class="extiw" title="wikipedia:Amdahl's law">wikipedia:Amdahl's law</a>) |
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