From jstewart@panix.com Wed Feb 08 12:51:30 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!panix!jstewart From: jstewart@panix.com (Joachim Stewart) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb08.125130.2964@panix.com> Date: Wed, 08 Feb 1995 12:51:30 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- === Joachim Stewart === Dept of Electrical Engineering, Public Access Unix of New York "They will send a copy in my place." From ssanchez@pacbell.net Fri Feb 10 10:54:30 1995 Path: ashpoly!cascade!mxgate!coyoacan!pacbell!ssanchez From: ssanchez@pacbell.net (Sven Sánchez) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb10.105430.7736@pacbell.net> Date: Fri, 10 Feb 1995 10:54:30 GMT References: <1995Feb08.125130.2964@panix.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Feb08.125130.2964@panix.com>, jstewart@panix.com (Joachim Stewart) 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. -- === Sven Sánchez === Dept of Electrical Engineering, Pacific Bell Internet Services "The hatch is open. Is anyone listening?" From tbrennan@demon.co.uk Sun Feb 12 01:29:30 1995 Path: ashpoly!cascade!brgate!saturno!demon!tbrennan From: tbrennan@demon.co.uk (Takeshi Brennan) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb12.012930.8370@demon.co.uk> Date: Sun, 12 Feb 1995 01:29:30 GMT References: <1995Feb08.125130.2964@panix.com> <1995Feb10.105430.7736@pacbell.net> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Feb10.105430.7736@pacbell.net>, ssanchez@pacbell.net (Sven Sánchez) 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. -- Takeshi Brennan Tape trading list upon request. SASE required for international mail. From tgonzalez@ox.ac.uk Mon Feb 13 11:30:30 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!ox!tgonzalez From: tgonzalez@ox.ac.uk (Tobias González) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb13.113030.3629@ox.ac.uk> Date: Mon, 13 Feb 1995 11:30:30 GMT References: <1995Feb08.125130.2964@panix.com> <1995Feb10.105430.7736@pacbell.net> <1995Feb12.012930.8370@demon.co.uk> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Feb12.012930.8370@demon.co.uk>, tbrennan@demon.co.uk (Takeshi Brennan) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Tobias González "Measuring a record you own is listening, not piracy." PC-9821Ap2 (NEC) / SunOS 4.1.4 From ddubois@kiae.su Tue Feb 14 16:41:30 1995 Path: ashpoly!cascade!transat!ukc!fennimore!kiae!ddubois From: ddubois@kiae.su (Dong-hyun Dubois) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb14.164130.5303@kiae.su> Date: Tue, 14 Feb 1995 16:41:30 GMT References: <1995Feb08.125130.2964@panix.com> <1995Feb10.105430.7736@pacbell.net> <1995Feb12.012930.8370@demon.co.uk> <1995Feb13.113030.3629@ox.ac.uk> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Feb13.113030.3629@ox.ac.uk>, tgonzalez@ox.ac.uk (Tobias González) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Dong-hyun Dubois "In theory there is no difference between theory and practice." Sun 3/60 (SunOS 4.1.1) / SunOS 4.1.4