Article View: comp.lang.misc
Article #2102Re: Aggressive optimization
From: Greg Lindahl
Date: Fri, 16 Nov 1990 02:28
Date: Fri, 16 Nov 1990 02:28
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1380 bytes
In article <9576:Nov1523:11:0990@kramden.acf.nyu.edu> brnstnd@kramden.acf.nyu.edu (Dan Bernstein) writes: >Matt pointed out that gcc did much better. My name is spelled "Greg". Matt Crawford may also be an astronomer, but my hair is much longer. Trivial to tell us apart. > gcc, however, will produce suboptimal code for > > for (j = 0;j < 100;j++) > a[i * j] = ...; If you forget to turn on strength reduction, you deserve what you get. >Even good Fortran >optimizers don't do very well on moderately complex code. I showed you code in which FORTRAN does well, and you have to hand-optimize C to beat it. Please don't forget history, or you will have to repeat it. The best part of "discussing" anything with you is that you refuse to learn.
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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!ncar!gatech!mcnc!uvaarpa!murdoch!astsun9.astro.Virginia.EDU!gl8fReferences:
<5494:Nov1519:06:3790@kramden.acf.nyu.edu> <6063@lanl.gov> <9576:Nov1523:11:0990@kramden.acf.nyu.edu>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!ncar!gatech!mcnc!uvaarpa!murdoch!astsun9.astro.Virginia.EDU!gl8f From: gl8f@astsun9.astro.Virginia.EDU (Greg Lindahl) Newsgroups: comp.lang.misc Subject: Re: Aggressive optimization Message-ID: <1990Nov16.022829.19283@murdoch.acc.Virginia.EDU> Date: 16 Nov 90 02:28:29 GMT References: <5494:Nov1519:06:3790@kramden.acf.nyu.edu> <6063@lanl.gov> <9576:Nov1523:11:0990@kramden.acf.nyu.edu> Sender: news@murdoch.acc.Virginia.EDU Organization: Department of Astronomy, University of Virginia Lines: 21