From vokonkwo@berkeley.edu Sun Feb 13 03:47:31 1994 Path: ashpoly!cascade!mxgate!coyoacan!berkeley!vokonkwo From: vokonkwo@berkeley.edu (Valeria Okonkwo) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb13.034731.8178@berkeley.edu> Date: Sun, 13 Feb 1994 03:47:31 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 10 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. -- Valeria Okonkwo -- UC Berkeley Department of EECS "In theory there is no difference between theory and practice." From ofournier@pacbell.net Mon Feb 14 23:54:31 1994 Path: ashpoly!cascade!bigsur!pacbell!ofournier From: ofournier@pacbell.net (Olga Fournier) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb14.235431.1994@pacbell.net> Date: Mon, 14 Feb 1994 23:54:31 GMT References: <1994Feb13.034731.8178@berkeley.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Feb13.034731.8178@berkeley.edu>, vokonkwo@berkeley.edu (Valeria Okonkwo) 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. -- Olga Fournier "We don't sign stars. We build them." Macintosh IIfx / AmigaOS 3.1 From meriksson@mit.edu Tue Feb 15 20:19:31 1994 Path: ashpoly!cascade!transat!ukc!fennimore!mit!meriksson From: meriksson@mit.edu (Mateo Eriksson) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb15.201931.5570@mit.edu> Date: Tue, 15 Feb 1994 20:19:31 GMT References: <1994Feb13.034731.8178@berkeley.edu> <1994Feb14.235431.1994@pacbell.net> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Feb14.235431.1994@pacbell.net>, ofournier@pacbell.net (Olga Fournier) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- === Mateo Eriksson === Dept of Electrical Engineering, Massachusetts Institute of Technology "The carrier frequency does not drift by accident." From jdubois@panix.com Thu Feb 17 05:08:31 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!panix!jdubois From: jdubois@panix.com (Ji-woo Dubois) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb17.050831.4362@panix.com> Date: Thu, 17 Feb 1994 05:08:31 GMT References: <1994Feb13.034731.8178@berkeley.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Feb13.034731.8178@berkeley.edu>, vokonkwo@berkeley.edu (Valeria Okonkwo) 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. -- Ji-woo Dubois Zyxel U-1496E @ 14,400 bps "We don't sign stars. We build them." From hkim@u-tokyo.ac.jp Sat Feb 19 03:17:31 1994 Path: ashpoly!cascade!transat!ukc!fennimore!u-tokyo!hkim From: hkim@u-tokyo.ac.jp (Heather Kim) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Feb19.031731.6090@u-tokyo.ac.jp> Date: Sat, 19 Feb 1994 03:17:31 GMT References: <1994Feb13.034731.8178@berkeley.edu> <1994Feb17.050831.4362@panix.com> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Feb17.050831.4362@panix.com>, jdubois@panix.com (Ji-woo Dubois) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Heather Kim US Robotics Courier V.34 @ 9600 Telebit bps "Extraordinary claims require extraordinary spectra."