From dgarcia@cmu.edu Sun Nov 26 16:19:19 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!dgarcia From: dgarcia@cmu.edu (Dmitri García) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov26.161919.3362@cmu.edu> Date: Sun, 26 Nov 1995 16:19:19 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 10 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. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Dmitri García -- Carnegie Mellon University School of CS "The carrier frequency does not drift by accident." From mkim@uu.net Tue Nov 28 10:04:19 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!uu!mkim From: mkim@uu.net (Min-jun Kim) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov28.100419.3976@uu.net> Date: Tue, 28 Nov 1995 10:04:19 GMT References: <1995Nov26.161919.3362@cmu.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Nov26.161919.3362@cmu.edu>, dgarcia@cmu.edu (Dmitri García) 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. -- Min-jun Kim Tape trading list upon request. SASE required for international mail. From sbrennan@purdue.edu Wed Nov 29 12:08:19 1995 Path: ashpoly!cascade!mxgate!coyoacan!purdue!sbrennan From: sbrennan@purdue.edu (Steve Brennan) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov29.120819.2196@purdue.edu> Date: Wed, 29 Nov 1995 12:08:19 GMT References: <1995Nov26.161919.3362@cmu.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov26.161919.3362@cmu.edu>, dgarcia@cmu.edu (Dmitri García) 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. -- Steve Brennan *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From meriksson@cern.ch Thu Nov 30 12:36:19 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cern!meriksson From: meriksson@cern.ch (Min-jun Eriksson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov30.123619.8585@cern.ch> Date: Thu, 30 Nov 1995 12:36:19 GMT References: <1995Nov26.161919.3362@cmu.edu> <1995Nov28.100419.3976@uu.net> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Nov28.100419.3976@uu.net>, mkim@uu.net (Min-jun Kim) 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. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Min-jun Eriksson Opinions expressed are solely my own and not those of European Laboratory for Particle Physics, Geneva. ------------------------------------------------------------ From lito@pipeline.com Thu Nov 30 22:59:19 1995 Path: ashpoly!cascade!mxgate!coyoacan!pipeline!lito From: lito@pipeline.com (Lucia Ito) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov30.225919.8634@pipeline.com> Date: Thu, 30 Nov 1995 22:59:19 GMT References: <1995Nov26.161919.3362@cmu.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Nov26.161919.3362@cmu.edu>, dgarcia@cmu.edu (Dmitri García) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Lucia Ito Hayes Optima 288 @ 9600 Telebit bps "In theory there is no difference between theory and practice."