Amdahl's law in computer programming states that a program with parallel processing will have a limiting factor on program speedup such that adding more processors may not make the program run faster. This is because a program with parallel processing requires only a small number of sequential instructions.
What is an example of Amdahl's law?
A computer software that processes files would be an example. This program's component that scans the disk's directory might also internally generate a list of files in memory. A different section of the program then distributes each file to a different thread for processing.
Amdahl's law: why use it?
The key is to always have Amdahl's law in mind. According to this, the amount of time that the upgraded part is actually used limits the overall performance boost that can be obtained by optimizing a particular component of a system.
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