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From: Ivan Voras <ivoras@freebsd.org>
Date: Mon, 19 Oct 2009 16:35:08 +0200
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To: Rink Springer <rink@freebsd.org>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: Make process title - % complete
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2009/10/19 Rink Springer <rink@freebsd.org>:
> Hi Ivan,
>
> On Mon, Oct 19, 2009 at 03:52:30PM +0200, Ivan Voras wrote:
>> if nobody objects, I'll commit it :)
>
> I seem to recall that setproctitle() is quite expensive to call; perhaps
> it would make sense offer a flag to prevent make(1) from calling it? [1]
>
> Anyway, the feature looks nice! I'd like to have it...
>
> [1] I'm unsure how expensive it is compared to fork(1)-ing etc; I'd
> =C2=A0 =C2=A0expect it's negligable but who knows...

The loop it's called in is not processed bazillion times per second
(though it *is* called surprisingly often; small, fast jobs can result
in somewhere in the order of magnitude of 100 iterations per second on
a fast CPU). As you said - I expect it's negligable compared to fork()
and the work jobs themselves do.