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From: "Milan Stanojević" <milanst@gmail.com>
To: Alain Frisch <alain@frisch.fr>
Cc: Caml List <caml-list@inria.fr>
Subject: Re: [Caml-list] empty mli for executable
Date: Thu, 3 Oct 2013 14:42:31 -0400	[thread overview]
Message-ID: <CAKR7PS9SBXJUak76btS63C8Avk5yWo=8ZnrNfdv2-XLmU8zbdg@mail.gmail.com> (raw)
In-Reply-To: <524DAD23.7070206@frisch.fr>

> The empty interface implies that toplevel values computed by those modules
> don't need to be stored in the global symbol slots.  Those slots are roots
> for the GC and are thus scanned every time it runs.  The fewer global
> symbols, the quicker the GC will be.  Well, this is the theory, I'd be
> really surprised if this materialized in a speed up  which can be observed.

Thanks, Alain.
Just one question about this. Let's say I have a toplevel value in my
executable and an empty mli. How is this toplevel value then retained?
Is it part of some other root set ?


> Having an empty interface has a much more practical interest, in general: it
> allows the compiler to detect unused declarations in the implementation (if
> the corresponding warnings are enabled), and thus to reduce code rot.

Yes, I've been doing this, it is a very useful feature of the compiler.

  reply	other threads:[~2013-10-03 18:43 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-10-03 16:50 Milan Stanojević
2013-10-03 17:45 ` Alain Frisch
2013-10-03 18:42   ` Milan Stanojević [this message]
2013-10-03 20:52     ` Alain Frisch

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