From lfournier@panix.com Tue Jan 24 21:00:40 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!panix!lfournier From: lfournier@panix.com (Lars Fournier) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan24.210040.3501@panix.com> Date: Tue, 24 Jan 1995 21:00:40 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. 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. -- Lars Fournier | lfournier@panix.com PGP Key fingerprint: 8E45 F68A 1365 C50C "Keep the channels open." From sduarte@inria.fr Thu Jan 26 22:30:40 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!sduarte From: sduarte@inria.fr (Steve Duarte) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan26.223040.3555@inria.fr> Date: Thu, 26 Jan 1995 22:30:40 GMT References: <1995Jan24.210040.3501@panix.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jan24.210040.3501@panix.com>, lfournier@panix.com (Lars Fournier) 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. PGP Public key available via finger or upon request. -- Steve Duarte *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From mvasiliev@kth.se Sat Jan 28 15:38:40 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!mvasiliev From: mvasiliev@kth.se (Min-jun Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan28.153840.2638@kth.se> Date: Sat, 28 Jan 1995 15:38:40 GMT References: <1995Jan24.210040.3501@panix.com> <1995Jan26.223040.3555@inria.fr> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Jan26.223040.3555@inria.fr>, sduarte@inria.fr (Steve Duarte) 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. -- Min-jun Vasiliev Tape trading list upon request. SASE required for international mail. From sokonkwo@unam.mx Mon Jan 30 14:21:40 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!unam!sokonkwo From: sokonkwo@unam.mx (Sven Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan30.142140.4934@unam.mx> Date: Mon, 30 Jan 1995 14:21:40 GMT References: <1995Jan24.210040.3501@panix.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Jan24.210040.3501@panix.com>, lfournier@panix.com (Lars Fournier) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- === Sven Okonkwo === Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA) "The hatch is open. Is anyone listening?" From dsokolov@uu.net Wed Feb 01 15:12:40 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!uu!dsokolov From: dsokolov@uu.net (Diego Sokolov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb01.151240.7493@uu.net> Date: Wed, 01 Feb 1995 15:12:40 GMT References: <1995Jan24.210040.3501@panix.com> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jan24.210040.3501@panix.com>, lfournier@panix.com (Lars Fournier) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- === Diego Sokolov === Dept of Electrical Engineering, UUNET Technologies, Falls Church VA "Do not worship the copy."