R Under development (unstable) (2023-12-09 r85665 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> suppressPackageStartupMessages(library(float))
> 
> x = matrix(1:30, 10)
> y = matrix(1:10, 2, 10)
> z = matrix(1:5, 5, 3)
> 
> xs = fl(x)
> ys = fl(y)
> zs = fl(z)
> 
> 
> test = dbl(t(xs))
> stopifnot(all.equal(test, t(x)))
> 
> test = dbl(t(ys))
> stopifnot(all.equal(test, t(y)))
> 
> test = dbl(t(zs))
> stopifnot(all.equal(test, t(z)))
> 
> proc.time()
   user  system elapsed 
   0.31    0.06    0.36