From: kilgallen@eisner.decus.org (Larry Kilgallen)
Subject: Re: Language Efficiency
Date: 1995/04/05
Date: 1995-04-05T00:00:00+00:00 [thread overview]
Message-ID: <1995Apr5.193652.9588@eisner.decus.org> (raw)
In-Reply-To: D6K812.7w8@oasis.icl.co.uk
In article <D6K812.7w8@oasis.icl.co.uk>, mrw@oasis.icl.co.uk (Mike Wilson) writes:
> Yes, but I could generalise and say that some languages such as 'C'
> were designed with efficiency in mind. That's not to say a rotten
> compiler wouldn't produce huge, slow code. There _are_ very efficient
> COBOL compilers around. I've heard ICL's VME COBOL compiler produces
> very efficient code (but I don't have any first-hand knowledge of it).
Actually, as I understand it efficiency works the other way around.
As a low level language, C lets a programmer considerably affect the
generated code when a non-optimizing compiler is used. Switch to a
different compiler or move to a different instruction set and what
was formerly optimal is no longer optimal.
Likewise, if you use optimizing compilers high level languages will
produce better results than C.
Obviously the lowest level languages processors which directly express
machine instructions to be used leave the least opportunity for any
optimization of what the programmer has provided. (Although for
Alpha VMS, DEC did have to build a compiler for the VAX assembly
language, and I think there is at least one optimization which can
be enabled.)
Larry Kilgallen
next prev parent reply other threads:[~1995-04-05 0:00 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
1995-04-02 0:00 Language Efficiency Robert C. Bethel
1995-04-04 0:00 ` Bob Kitzberger
1995-04-05 0:00 ` Mike Wilson
1995-04-05 0:00 ` Larry Kilgallen [this message]
1995-04-05 0:00 ` David Weller
1995-04-04 0:00 ` Harold P Zbiegien
1995-04-04 0:00 ` Larry Kilgallen
1995-04-06 0:00 ` Robert Dewar
1995-04-04 0:00 ` Kennel
1995-04-05 0:00 ` Ray Toal
1995-04-07 0:00 ` Robert Dewar
[not found] ` <3m9o9q$igf@stc06.ctd.ornl.gov>
[not found] ` <D6ss6z.Gvw@mcshub.dcss.mcmaster.ca>
[not found] ` <dewar.797512974@gnat>
[not found] ` <3mbmd5$s06@icebox.mfltd.co.uk>
1995-04-19 0:00 ` C++ not OOP? (Was: " Harley Davis
[not found] ` <D6uA77.Lqp@mcshub.dcss.mcmaster.ca>
[not found] ` <3mcfbf$psl@acmez.gatech.edu>
[not found] ` <3mgnkc$e3j@atlantis <3muaif$46u@atlantis.utmb.edu>
[not found] ` <3n0lsu$nio@druid.borland.com>
[not found] ` <3n0uvi$8jt@atlantis.utmb.edu>
1995-04-19 0:00 ` Fernando Mato Mira
1995-04-19 0:00 ` Curtis Bass
1995-04-19 0:00 ` David Weller
1995-04-20 0:00 ` Curtis Bass
1995-04-20 0:00 ` David Weller
1995-04-20 0:00 ` Robert Dewar
1995-04-21 0:00 ` Curtis Bass
1995-04-21 0:00 ` Robert Dewar
1995-04-20 0:00 ` Curtis Bass
1995-04-21 0:00 ` Fernando Mato Mira
1995-04-21 0:00 ` Robert Martin
1995-04-21 0:00 ` Ed Osinski
1995-04-21 0:00 ` Robert Martin
1995-04-20 0:00 ` Matt Austern
1995-04-21 0:00 ` Robert Martin
1995-04-21 0:00 ` Curtis Bass
1995-04-21 0:00 ` Matt Austern
1995-04-22 0:00 ` David Weller
1995-04-22 0:00 ` Robert Martin
1995-04-22 0:00 ` OOAD courses by Object Mentor cjames
1995-04-21 0:00 ` C++ not OOP? (Was: Language Efficiency Ed Osinski
1995-04-21 0:00 ` Robert Martin
1995-04-21 0:00 ` Curtis Bass
[not found] ` <3mcoh6$add@Starbase.NeoSoft.COM>
[not found] ` <3mdrpf$3o9@disunms.epfl.ch>
[not found] ` <dewar.797608300@gnat>
[not found] ` <3mg45s$5r7@disunms.epfl.ch>
[not found] ` <3mjc8c$630@crcnis3.unl.edu>
[not found] ` <D71Gs9.2FG@nntpa.cb.att.com>
[not found] ` <EACHUS.95Apr17162921@spectre.mitre.org>
[not found] ` <3n1als$ksi@no-names.nerdc.ufl.edu>
1995-04-19 0:00 ` Multiple dispatch (was Re: C++ not OOP?) Fernando Mato Mira
[not found] ` <1995Apr13.152104@di.epfl.ch>
1995-04-21 0:00 ` C++ not OOP? (Was: Language Efficiency James McKim
[not found] ` <3mgnkc$e3j@atlantis.utmb.edu>
[not found] ` <3mk65q$1kti@watnews1.watson.ibm.com>
[not found] ` <3muavq$46u@atlantis.utmb.edu>
1995-04-21 0:00 ` Norman H. Cohen
1995-04-21 0:00 ` Curtis Bass
[not found] ` <1995Apr13.180317.3308@rcmcon.com>
[not found] ` <3muaif$46u@atlantis.utmb.edu>
1995-04-21 0:00 ` Robert Martin
1995-04-21 0:00 ` Curtis Bass
1995-04-21 0:00 ` Robert Dewar
1995-04-22 0:00 ` Robert Martin
[not found] ` <dewar.797566928@gnat>
[not found] ` <D6vxDG.JKJ@mcshub.dcss.mcmaster.ca>
[not found] ` <dewar.797636710@gnat>
[not found] ` <D6xF22.38H@mcshub.dcss.mcmaster.ca>
[not found] ` <dewar.797729041@gnat>
[not found] ` <3msdop$862@stc06.ctd.ornl.gov>
1995-04-19 0:00 ` Paul Graham
1995-04-19 0:00 ` Robert Dewar
1995-04-19 0:00 ` Multiple dispatch (was Re: C++ not OOP?) Kenneth Almquist
1995-04-19 0:00 ` Robert I. Eachus
1995-04-21 0:00 ` C++ not OOP? (Was: Language Efficiency Norman H. Cohen
1995-04-21 0:00 ` Fernando Mato Mira
1995-04-21 0:00 ` Erik Naggum
1995-04-21 0:00 ` Multiple dispatch (was Re: C++ not OOP?) Robert I. Eachus
[not found] ` <MATT.95Apr17124932@physics10.berkeley.edu>
[not found] ` <3mujnl$4u8@atlantis.utmb.edu>
1995-04-20 0:00 ` C++ not OOP? (Was: Language Efficiency ron house
1995-04-21 0:00 ` Robert Martin
1995-04-21 0:00 ` Curtis Bass
1995-04-19 0:00 ` Adam Beneschan
1995-04-19 0:00 ` Robert Dewar
[not found] ` <dewar.797469506@gnat>
[not found] ` <1995Apr10.095958@di.epfl.ch>
[not found] ` <dewar.797513130@gnat>
[not found] ` <1995Apr10.165638@di.epfl.ch>
[not found] ` <D6yGqv.4BG@nntpa.cb.att.com>
1995-04-21 0:00 ` Fergus Henderson
1995-04-22 0:00 ` Kenneth Almquist
1995-04-19 0:00 ` Fergus Henderson
1995-04-19 0:00 ` Robert Dewar
1995-04-20 0:00 ` Kennel
1995-04-19 0:00 ` Robert Dewar
1995-04-20 0:00 ` Matt Austern
1995-04-21 0:00 ` Robert I. Eachus
1995-04-05 0:00 ` Mitch Gart
1995-04-05 0:00 ` Lawrence Free/ A.F. Software Services
1995-04-06 0:00 ` Ken Leidner
1995-04-06 0:00 ` Larry Kilgallen
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