[luatex] Identifying why LuaTeX 2023 is slower than LuaTeX 2022

[Werner LEMBERG]

>     Karl, could you please rebuild the TL LuaTeX binaries with -O3
>     for x86_64-linux?
> 
> I committed (r68135) the binaries from Norbert's last autobuild on
> github for TL23: [...]

I can confirm that the new `luatex` binary is much faster than the
previous one, thanks!


    Werner