R Under development (unstable) (2024-09-21 r87186 ucrt) -- "Unsuffered Consequences"
Copyright (C) 2024 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(supc)
> supc:::.set_num_threads(2)
> set.seed(1)
> x <- matrix(0, 20, 20)
> x[] <- rnorm(length(x))
> system.time(d1 <- supc:::.test.dist(x))
   user  system elapsed 
      0       0       0 
> system.time(d2 <- stats::dist(x))
   user  system elapsed 
      0       0       0 
> max(abs(d1 - d2)) < sqrt(.Machine$double.eps)
[1] TRUE
> 
> 
> x <- matrix(0, 200, 2000)
> x[] <- rnorm(length(x))
> system.time(d1 <- supc:::.test.dist(x))
   user  system elapsed 
   0.25    0.00    0.13 
> system.time(d2 <- stats::dist(x))
   user  system elapsed 
   0.15    0.00    0.16 
> max(abs(d1 - d2)) < sqrt(.Machine$double.eps)
[1] TRUE
> 
> 
> proc.time()
   user  system elapsed 
   0.79    0.07    0.73