R Under development (unstable) (2023-12-09 r85665 ucrt) -- "Unsuffered Consequences"
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> suppressPackageStartupMessages(library(float))
> set.seed(1234)
> 
> tol = 1e-6
> 
> x = crossprod(matrix(stats::rnorm(30), 10))
> xs = fl(x)
> 
> 
> test = dbl(chol2inv(chol(xs)))
> truth = chol2inv(chol(x))
> stopifnot(all.equal(test, truth, tol=tol))
> 
> proc.time()
   user  system elapsed 
   0.29    0.04    0.34