Re: Justifying Optimization

Robert A Duff <bobduff@shell01.TheWorld.com>
5 Feb 2003 23:57:15 -0500

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[10 earlier articles]
Re: Justifying Optimization jvorbrueggen@mediasec.de (Jan C.=?iso-8859-1?Q?Vorbr=FCggen?=) (2003-01-25)
Re: Justifying Optimization joachim_d@gmx.de (Joachim Durchholz) (2003-01-26)
Re: Justifying Optimization lars@bearnip.com (2003-01-26)
Re: Justifying Optimization cgweav@aol.com (2003-01-29)
Re: Justifying Optimization tmk@netvision.net.il (2003-01-30)
Re: Justifying Optimization lex@cc.gatech.edu (Lex Spoon) (2003-02-05)
Re: Justifying Optimization bobduff@shell01.TheWorld.com (Robert A Duff) (2003-02-05)
Re: Justifying Optimization vbdis@aol.com (2003-02-06)
Re: Justifying Optimization vbdis@aol.com (2003-02-06)
Re: Justifying Optimization joachim_d@gmx.de (Joachim Durchholz) (2003-02-11)
Re: Justifying Optimization joachim_d@gmx.de (Joachim Durchholz) (2003-02-11)
Re: Justifying Optimization joachim_d@gmx.de (Joachim Durchholz) (2003-02-11)
Re: Justifying Optimization bhurt@spnz.org (2003-02-11)
[3 later articles]
| List of all articles for this month |
From: Robert A Duff <bobduff@shell01.TheWorld.com>
Newsgroups: comp.compilers
Date: 5 Feb 2003 23:57:15 -0500
Organization: The World Public Access UNIX, Brookline, MA
References: 03-01-088 03-01-098 03-01-141 03-01-158
Keywords: optimize, practice
Posted-Date: 05 Feb 2003 23:57:15 EST

Joachim Durchholz <joachim_d@gmx.de> writes:


> Additional testing with the optimizer turned on will just find a lot
> of bugs that were never relevant in debug code - why fix them?


Those bugs might rear their ugly heads when you upgrade to a new
compiler version. Or when you make seemingly-irrelevant changes in
nearby code. Or when you port your program to a new machine or OS.
(How many times have a I seen projects where portability was
explicitly "not important" but it turned out to important later one?)


Seems to me, you'd like to find those optimizer-triggered bugs earlier
rather than later.


- Bob

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