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From:   Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Date:   Wed, 5 May 2021 00:02:33 +0200
Message-ID: <CANiq72=5766fGQjNoMoOxrywoJHQ+-i4U+Nb62MeEaRok4LCFg@mail.gmail.com>
Subject: Re: Very slow clang kernel config ..
To:     Adrian Bunk <bunk@kernel.org>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        Tom Stellard <tstellar@redhat.com>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Masahiro Yamada <masahiroy@kernel.org>,
        Nathan Chancellor <nathan@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        clang-built-linux <clang-built-linux@googlegroups.com>,
        Fangrui Song <maskray@google.com>,
        Serge Guelton <sguelton@redhat.com>,
        Sylvestre Ledru <sylvestre@mozilla.com>
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On Sun, May 2, 2021 at 11:48 PM Adrian Bunk <bunk@kernel.org> wrote:
>
> Library packages in ecosystems like Go or Rust are copies of the source
> code, and when an application package is built with these "libraries"
> (might even be using LTO) this is expected to be faster than using
> shared libraries.

Rust libraries only need to include "copies" for generics; and only
enough information to use them. Keeping the raw source code would be
one way of doing that (like C++ header-only libraries), but it is not
required.

However, it is true that Rust does not have a stable ABI, that the
vast majority of Rust open source applications get built from source
via Cargo and that Cargo does not share artifacts in its cache.

Cheers,
Miguel