From sduarte@kiae.su Thu Jun 13 10:06:46 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kiae!sduarte From: sduarte@kiae.su (Sven Duarte) Newsgroups: comp.sys.m68k Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun13.100646.1881@kiae.su> Date: Thu, 13 Jun 1996 10:06:46 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Sven Duarte *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From astewart@uni-hamburg.de Fri Jun 14 15:09:46 1996 Path: ashpoly!cascade!transat!ukc!fennimore!uni-hamburg!astewart From: astewart@uni-hamburg.de (Aiko Stewart) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun14.150946.5839@uni-hamburg.de> Date: Fri, 14 Jun 1996 15:09:46 GMT References: <1996Jun13.100646.1881@kiae.su> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1996Jun13.100646.1881@kiae.su>, sduarte@kiae.su (Sven Duarte) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Top-posters will be placed in my ~/.killfile without notice. -- Aiko Stewart *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From mduarte@u-tokyo.ac.jp Sat Jun 15 09:08:46 1996 Path: ashpoly!cascade!bigsur!u-tokyo!mduarte From: mduarte@u-tokyo.ac.jp (Mikhail Duarte) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun15.090846.9717@u-tokyo.ac.jp> Date: Sat, 15 Jun 1996 09:08:46 GMT References: <1996Jun13.100646.1881@kiae.su> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1996Jun13.100646.1881@kiae.su>, sduarte@kiae.su (Sven Duarte) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. If you are posting from AOL, please read RFC 1036 before posting again. -- Mikhail Duarte | mduarte@u-tokyo.ac.jp PGP Key fingerprint: DFB4 04C1 5B17 3762 "Keep the channels open." From slindqvist@tum.de Mon Jun 17 00:51:46 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!tum!slindqvist From: slindqvist@tum.de (Sven Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun17.005146.4820@tum.de> Date: Mon, 17 Jun 1996 00:51:46 GMT References: <1996Jun13.100646.1881@kiae.su> <1996Jun15.090846.9717@u-tokyo.ac.jp> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Jun15.090846.9717@u-tokyo.ac.jp>, mduarte@u-tokyo.ac.jp (Mikhail Duarte) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. > If you are posting from AOL, please read RFC 1036 before posting again. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Sven Lindqvist "There are 14 nodes and only 10 countries. Count again." Mac IIci / 68882 FPU / SunOS 4.1.4