Re: performance issue with TeX Live

[Emmanuel Beffara]

Hello,

De Maxim Cournoyer le 14/10/2023 à 18:06:
> > I tried to explore this but I see no reason why the ls-R files would be
> > ignored and I don't know how to explore this further. I do want to 
> > contribute
> > to a solution, because right now texlive is practically unusable in Guix.
> 
> Have you tried tracing execution with strace?  Maybe try 'strace -e
> file -f -s800 $texlive-cmd' and confirm whether the ls-R file gets used;
> if it does, you could then introspect said file to see if it provides
> what is being looked up or not.

I did try strace, that is how I observed that apparently all installed files
are stated (with newfstatat) several times in each compilation.

The ls-R file is actually read:

    $ grep /ls-R log
    28308 
access("/run/current-system/profile/share/texmf-dist/../texmf-dist/ls-R", R_OK) 
= 0
    28308 newfstatat(AT_FDCWD, 
"/run/current-system/profile/share/texmf-dist/../texmf-dist/ls-R", 
{st_mode=S_IFREG|0444, st_size=4053996, ...}, 0) = 0
    28308 openat(AT_FDCWD, 
"/run/current-system/profile/share/texmf-dist/../texmf-dist/ls-R", O_RDONLY) = 3

but aparently its contents are not taken into account.

-- 
Emmanuel