From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fac41,9a0ff0bffdf63657 X-Google-Attributes: gidfac41,public X-Google-Thread: 1108a1,9a0ff0bffdf63657 X-Google-Attributes: gid1108a1,public X-Google-Thread: f43e6,9a0ff0bffdf63657 X-Google-Attributes: gidf43e6,public X-Google-Thread: 103376,4b06f8f15f01a568 X-Google-Attributes: gid103376,public From: Patrick Logan Subject: Re: Software landmines (loops) Date: 1998/09/05 Message-ID: #1/1 X-Deja-AN: 388088327 References: <6sbuod$fra$1@hirame.wwa.com> <904556531.666222@miso.it.uq.edu.au> <35EAEC47.164424A7@s054.aone.net.au> <35EBBFAF.DE38C061@s054.aone.net.au> <35EC28BD.351F33DF@s054.aone.net.au> <35EED7D3.3CFDA8A4@iname.com> <35F0A288.F0AF78C2@earthlink.net> Organization: Teleport - Portland's Public Access (503) 220-1016 NNTP-Posting-Date: Fri, 04 Sep 1998 23:38:00 PDT Newsgroups: comp.lang.eiffel,comp.object,comp.software-eng,comp.lang.ada Date: 1998-09-05T00:00:00+00:00 List-Id: In comp.object Charles Hixson wrote: : Of course this is only part of it, but I think that changes in the : algorithm that scale linearly are generally overwhelmed by differences : between compiler implementations, and also that the best code for this : year may not be the best code for next year. I have read a little bit on Comp.arch over the last six months or so about how the hard core algorithm/performance people are finding significant differences in performance by paying attention to memory hierarchies, level 2 caches, etc. Some of these folks describe the best results come from treating the L2 and the CPU as an old, limited RAM computer. In this case, going to the off chip RAM is like going to core memory in "olden days". -- Patrick Logan (H) mailto:plogan@teleport.com (W) mailto:patrickl@gemstone.com http://www.gemstone.com