R Under development (unstable) (2025-08-17 r88631 ucrt) -- "Unsuffered Consequences"
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> # overhead.R --- Test function overhead
> 
> library(usl)
> 
> options(digits = 3, scipen = 6)
> 
> data(specsdm91)
> 
> overhead(usl(throughput ~ load, specsdm91))
    ideal contention coherency
1 1.00000     0.0000  0.000000
2 0.05556     0.0262  0.000887
3 0.02778     0.0270  0.001826
4 0.01389     0.0273  0.003705
5 0.00926     0.0275  0.005584
6 0.00694     0.0275  0.007462
7 0.00463     0.0276  0.011219
> 
> overhead(usl(throughput ~ load, specsdm91),
+          newdata = data.frame(load = c(1,2,4)))
  ideal contention coherency
1  1.00     0.0000 0.0000000
2  0.50     0.0139 0.0000522
3  0.25     0.0208 0.0001565
> 
> proc.time()
   user  system elapsed 
   0.25    0.04    0.28