From eperez@tum.de Sat Jun 01 22:20:46 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!eperez From: eperez@tum.de (Élodie Pérez) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun01.222046.8423@tum.de> Date: Sat, 01 Jun 1996 22:20:46 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] 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. Anyone running this on a Quadra 840AV with the 68040? -- Élodie Pérez *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0 From tmartinez@earthlink.net Mon Jun 03 00:52:46 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!earthlink!tmartinez From: tmartinez@earthlink.net (Takeshi Martínez) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun03.005246.9915@earthlink.net> Date: Mon, 03 Jun 1996 00:52:46 GMT References: <1996Jun01.222046.8423@tum.de> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Jun01.222046.8423@tum.de>, eperez@tum.de (Élodie Pérez) writes: > 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. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- === Takeshi Martínez === Dept of Electrical Engineering, EarthLink Network "5 sigma is a discovery. 7 is a question." From brobertson@kth.se Tue Jun 04 14:17:46 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!brobertson From: brobertson@kth.se (Bruno Robertson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun04.141746.7801@kth.se> Date: Tue, 04 Jun 1996 14:17:46 GMT References: <1996Jun01.222046.8423@tum.de> <1996Jun03.005246.9915@earthlink.net> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 8 In article <1996Jun03.005246.9915@earthlink.net>, tmartinez@earthlink.net (Takeshi Martínez) 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. -- Bruno Robertson Tape trading list upon request. SASE required for international mail. From rstewart@stanford.edu Tue Jun 04 23:36:46 1996 Path: ashpoly!cascade!transat!ukc!fennimore!stanford!rstewart From: rstewart@stanford.edu (Raj Stewart) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun04.233646.5385@stanford.edu> Date: Tue, 04 Jun 1996 23:36:46 GMT References: <1996Jun01.222046.8423@tum.de> <1996Jun03.005246.9915@earthlink.net> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jun03.005246.9915@earthlink.net>, tmartinez@earthlink.net (Takeshi Martínez) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Raj Stewart SupraFAXModem 28.8 @ 33,600 bps "The carrier frequency does not drift by accident." From akowalski@utexas.edu Wed Jun 05 14:06:46 1996 Path: ashpoly!cascade!bigsur!utexas!akowalski From: akowalski@utexas.edu (Anja Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun05.140646.6518@utexas.edu> Date: Wed, 05 Jun 1996 14:06:46 GMT References: <1996Jun01.222046.8423@tum.de> <1996Jun03.005246.9915@earthlink.net> <1996Jun04.233646.5385@stanford.edu> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Jun04.233646.5385@stanford.edu>, rstewart@stanford.edu (Raj Stewart) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Anja Kowalski Tape trading list upon request. SASE required for international mail.