Path: csiph.com!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail
From: Paul Rubin <no.email@nospam.invalid>
Newsgroups: comp.lang.forth
Subject: Re: Question about checking the stack
Date: Sat, 28 Nov 2015 19:17:32 -0800
Organization: A noiseless patient Spider
Lines: 9
Message-ID: <87poyteboz.fsf@jester.gateway.pace.com>
References: <b2176cc4-7ef3-4ba8-9270-6fed74cf429f@googlegroups.com> <87io4qh7fm.fsf@nightsong.com> <juednR9M3ch-9sjLnZ2dnUU7-Yf46u6z@supernews.com> <87k2p5g4n0.fsf@nightsong.com> <FMmdnUE8u_yT1svLnZ2dnUU7-Yn46u6z@supernews.com> <8737vtfrk9.fsf@nightsong.com> <47ydnYNjvc2dHcvLnZ2dnUU7-Yv46u6z@supernews.com> <87y4dldyuu.fsf@nightsong.com> <OqadnahRQMaVKsvLnZ2dnUU7-TGdnZ2d@supernews.com> <n36dd3$2nc$1@dont-email.me> <39c6cda5-fd60-4d19-85a3-c732e102a02b@googlegroups.com> <n3cilj$k3$1@dont-email.me> <e9ednXpMQvzhgMfLnZ2dnUU7-Y_46u6z@supernews.com>
Mime-Version: 1.0
Content-Type: text/plain
Injection-Info: mx02.eternal-september.org; posting-host="d09d25b6b873a1567c8bb21cd9fda25b"; logging-data="13445"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1/CFZkoCsKG5fAvbA/7Dq5d"
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)
Cancel-Lock: sha1:DGE8NVPdJV9zH+FPX721jceufrI= sha1:PBCjrrqeS9sC6qwy7jjkgJOclJQ=
Xref: csiph.com comp.lang.forth:43925

"Elizabeth D. Rather" <erather@forth.com> writes:
> Yes, but those "few microseconds" become attached to virtually
> everything you do, at which point they add up to a measurable
> overhead.

It seems to me that a serious compiler can track the stack picture and
eliminate the checks most of the time.  A naive interpreter might take a
noticable slowdown from the checks, but if you're using such an
interpreter, you're not too worried about speed anyway.