Re: High Level Language vs Assembly

jthorn@galileo.thp.univie.ac.at (Jonathan Thornburg)
14 Mar 2001 00:06:54 -0500

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Related articles
[22 earlier articles]
Re: High Level Language vs Assembly bobduff@world.std.com (Robert A Duff) (2001-03-10)
Re: High Level Language vs Assembly mr@peakfive.com (Matt) (2001-03-10)
Re: High Level Language vs Assembly joachim_d@gmx.de (Joachim Durchholz) (2001-03-10)
Re: High Level Language vs Assembly joachim_d@gmx.de (Joachim Durchholz) (2001-03-10)
Re: High Level Language vs Assembly toon@moene.indiv.nluug.nl (Toon Moene) (2001-03-12)
Re: High Level Language vs Assembly ts3@ukc.ac.uk (Tom Shackell) (2001-03-14)
Re: High Level Language vs Assembly jthorn@galileo.thp.univie.ac.at (2001-03-14)
Re: High Level Language vs Assembly tfjellstrom@home.com (Tom Fjellstrom) (2001-03-22)
Re: High Level Language vs Assembly anton@mips.complang.tuwien.ac.at (2001-03-22)
| List of all articles for this month |
From: jthorn@galileo.thp.univie.ac.at (Jonathan Thornburg)
Newsgroups: comp.compilers
Date: 14 Mar 2001 00:06:54 -0500
Organization: Universitaet Wien (Vienna, Austria) / Institut fuer Theoretische Physik
References: 01-02-094 01-02-101 01-03-074 01-03-081
Summary: optimization can gain a factor of 10
Keywords: assembler, optimize
Posted-Date: 14 Mar 2001 00:06:54 EST

Matt asked
> how much improvement
> is there between non-optimized and highly optimized code?


I have a C++ application (number-crunching, big arrays) which makes
heavy use of inline functions. Using gcc 2.95.2 on an alpha-ev6 system,
-O9 runs about a factor of 10 faster than -g. And gcc is _far_ from
the world's most-optimizing "optimizing compiler".


--
-- Jonathan Thornburg <jthorn@thp.univie.ac.at>
      http://www.thp.univie.ac.at/~jthorn/home.html
      Universitaet Wien (Vienna, Austria) / Institut fuer Theoretische Physik

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