Computational Physics Lectures: How to optimize codes, from vectorization to parallelization

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How do we define speedup? Simplest form

Speedup(code,sys,p) = $T_b/T_p$
Speedup measures the ratio of performance between two objects
Versions of same code, with different number of processors
Serial and vector versions
Try different programing languages, c++ and Fortran
Two algorithms computing the same result

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