Runtime_comparison.Rmd
The computation of codebooks in pdc
up to embedding dimension 7 is implemented in C code for faster execution. Here is a comparison of the gain in speed by switching from the R implementation using sort
to the C implementation based on nested ìf
blocks. First, the fast computation in C:
N <- 50000
x <- rnorm(N)
tic()
codebook <- pdc::codebook(x, m=7, use.fast = TRUE)
toc()
#> 0.006 sec elapsed
Then, the naive implementation in R: