bug#63986: Julia is very slow

[Ludovic Courtès]

Hi Cayetano,

Cc’in Efraim, Simon, and Nicolas who’ve looked into Julia packaging in
the past.  Hopefully we can get inspiration from Arch’s build recipe!

Thanks,
Ludo’.

Cayetano Santos <csantosb@inventati.org> skribis:

> Hi guix,
>
>   I just noticed that the following line
>
>     julia -e 'using Pkg; Pkg.add("BenchmarkTools"); using BenchmarkTools; N = 
> 1000; A = rand(N, N); B = rand(N, N); @btime $A*$B'
>
>   gives around 530 ms in my laptop when using guix provided julia. Same
>   behavior when running within a guix container.
>
>   This very same code, using the binary one may download from the julia
>   site gives 15 ms.
>
>   I’m using here an up to date guix. As a reference, julia binary
>   provided by archlinux takes also 15 ms.
>
> Thanks,
>
> Cayetano Santos