Re: The size of ‘.go’ files

[Mathieu Othacehe <othacehe@gnu.org>]

Hey Ludo,

> $ guix size $(readlink -f /run/current-system) | head -5
> store item                                                       total    self
> /gnu/store/4d0p06xgaw8lqa9db0d6728kkba8bizj-qemu-5.0.0            1651.6   745.2  18.8%
> /gnu/store/abiva5ivq99x30r2s9pa3jj0pv9g16sv-guix-1.1.0-4.bdc801e   468.0   268.8   6.8%
> /gnu/store/111zp1qyind7hsnvrm5830jhankmx4ls-linux-libre-5.4.43     243.6   243.6   6.2%
> /gnu/store/skxkrhgn9z0fg9hmnbcyfdgzs5w4ryrr-llvm-9.0.1             199.9   128.5   3.2%

When building a bare-bones Guix System disk-image, "Guix", "Guile" and
"Guile-static" represent 331M of .go files, see:

--8<---------------cut here---------------start------------->8---
find  /gnu/store/fvvpmrgnvr9jqxfn5m956xblisa8vzr4-guix-1.1.0-4.bdc801e
/gnu/store/ljcrz0d86r20phszvj6s1mdyjchz79ja-guile-static-stripped-3.0.2
/gnu/store/18hp7flyb3yid3yp49i6qcdq0sbi5l1n-guile-3.0.2-name "*.go"
-print0| du --files0-from=- -hc |tail -n1
--8<---------------cut here---------------end--------------->8---

If we compare it to the 943M of the "reduced" image I'm working on, it
makes around 1/3 of the final image.

> With 3.0.3-to-be and -O1, python-xyz.go weighs in at 3.4 MiB instead of
> 5.9 MiB!  Here’s the section size distribution:

Wooh, interesting!

Having a lighter disk-image isn't very important on desktop, but for the
embedded devices with small eMMC, any improvement would be really
welcome :)

Thanks,

Mathieu