[R-pkg-devel] Unusually long execution time for R.utils::gzip on r-devel-windows

[Kevin Ushey]

FWIW, as far as I can tell, Sys.readlink() still doesn't handle
symlinks (or junction points) on Windows. Were you thinking of
normalizePath()? That does now resolve both symlinks and junction
points on Windows (courtesy of a lot of work from Tomas), although I
don't recall the exact versions in which support was introduced. But
that would still give you a more efficient way of detecting such files
on Windows.

Kevin

On Sat, Feb 17, 2024 at 3:21 AM Stefan Mayer
<stefan.mayer using uni-tuebingen.de> wrote:
>
>
> > On 17. Feb 2024, at 09:16, Henrik Bengtsson <henrik.bengtsson using gmail.com> wrote:
> >
> > I can confirm that this has to fixed in R.utils. This gist is that
> > R.utils does lots of validation of read/write permissions, and deep
> > down it rely on system("dir") as a fallback method. If this is down
> > toward dirname(tempdir()), then it'll find a lot of files, e.g.
> >
> > […]
> >
> > So, yeah, wow!  I'll look into fixing this, probably by removing this
> > fallback approach, which is very rarely needed; it was added way back
> > when Sys.readlink() didn't cover all cases.
>
> Thanks for looking into this, Henrik! Feel free to let me know if I can help with anything.
>
> - Stefan
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