Speedup: S = ts/tp
Efficiency: e = S/Nproc
Extrapolated speedup: s = 1/[(p/Nproc) + (1-p)]
Percentage of parallel code: p = a / b
a = SNproc - Smproc
b = ( 1 - 1/Nproc )xSNproc - ( 1 - 1/Mproc )xSMproc
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