From mhughes@stanford.edu Sun Mar 05 05:26:01 1995 Path: ashpoly!cascade!mxgate!coyoacan!stanford!mhughes From: mhughes@stanford.edu (Mikhail Hughes) Newsgroups: comp.sys.m68k Subject: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar05.052601.6512@stanford.edu> Date: Sun, 05 Mar 1995 05:26:01 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 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. 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. -- Mikhail Hughes "A soul is not exclusive to biology." Mac IIci / 68882 FPU / Linux 1.2.13 From cgirard@mit.edu Sun Mar 05 11:59:01 1995 Path: ashpoly!cascade!mxgate!coyoacan!mit!cgirard From: cgirard@mit.edu (Callum Girard) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar05.115901.8157@mit.edu> Date: Sun, 05 Mar 1995 11:59:01 GMT References: <1995Mar05.052601.6512@stanford.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Mar05.052601.6512@stanford.edu>, mhughes@stanford.edu (Mikhail Hughes) 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. -- Callum Girard -- Massachusetts Institute of Technology "5 sigma is a discovery. 7 is a question." From ocampbell@purdue.edu Mon Mar 06 20:51:01 1995 Path: ashpoly!cascade!transat!ukc!fennimore!purdue!ocampbell From: ocampbell@purdue.edu (Olga Campbell) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar06.205101.1099@purdue.edu> Date: Mon, 06 Mar 1995 20:51:01 GMT References: <1995Mar05.052601.6512@stanford.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Mar05.052601.6512@stanford.edu>, mhughes@stanford.edu (Mikhail Hughes) 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. -- Olga Campbell Opinions expressed are solely my own and not those of Purdue University Engineering Computer Network. ------------------------------------------------------------ From emoreno@u-tokyo.ac.jp Tue Mar 07 08:34:01 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!u-tokyo!emoreno From: emoreno@u-tokyo.ac.jp (Elaine Moreno) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar07.083401.9613@u-tokyo.ac.jp> Date: Tue, 07 Mar 1995 08:34:01 GMT References: <1995Mar05.052601.6512@stanford.edu> <1995Mar06.205101.1099@purdue.edu> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Mar06.205101.1099@purdue.edu>, ocampbell@purdue.edu (Olga Campbell) 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. -- Elaine Moreno | emoreno@u-tokyo.ac.jp PGP Key fingerprint: 783C 5819 19BE 5784 "Keep the channels open." From smoreno@kiae.su Wed Mar 08 22:24:01 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!kiae!smoreno From: smoreno@kiae.su (Seo-yeon Moreno) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar08.222401.1965@kiae.su> Date: Wed, 08 Mar 1995 22:24:01 GMT References: <1995Mar05.052601.6512@stanford.edu> <1995Mar05.115901.8157@mit.edu> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Mar05.115901.8157@mit.edu>, cgirard@mit.edu (Callum Girard) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Seo-yeon Moreno Tape trading list upon request. SASE required for international mail.