From tsantos@inria.fr Wed Aug 16 13:39:33 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!inria!tsantos From: tsantos@inria.fr (Takeshi Santos) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug16.133933.8102@inria.fr> Date: Wed, 16 Aug 1995 13:39:33 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N 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. -- === Takeshi Santos === Dept of Electrical Engineering, INRIA Rocquencourt "When every node is whole, the channel opens." From rcampbell@demon.co.uk Thu Aug 17 13:38:33 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!rcampbell From: rcampbell@demon.co.uk (Rodrigo Campbell) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug17.133833.7547@demon.co.uk> Date: Thu, 17 Aug 1995 13:38:33 GMT References: <1995Aug16.133933.8102@inria.fr> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Aug16.133933.8102@inria.fr>, tsantos@inria.fr (Takeshi Santos) 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. -- Rodrigo Campbell Tape trading list upon request. SASE required for international mail. From akang@tum.de Thu Aug 17 15:28:33 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!tum!akang From: akang@tum.de (Anja Kang) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug17.152833.5059@tum.de> Date: Thu, 17 Aug 1995 15:28:33 GMT References: <1995Aug16.133933.8102@inria.fr> <1995Aug17.133833.7547@demon.co.uk> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Aug17.133833.7547@demon.co.uk>, rcampbell@demon.co.uk (Rodrigo Campbell) 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. -- Anja Kang *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From aito@mindspring.com Sat Aug 19 06:31:33 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mindspring!aito From: aito@mindspring.com (Amy Ito) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug19.063133.5253@mindspring.com> Date: Sat, 19 Aug 1995 06:31:33 GMT References: <1995Aug16.133933.8102@inria.fr> <1995Aug17.133833.7547@demon.co.uk> <1995Aug17.152833.5059@tum.de> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Aug17.152833.5059@tum.de>, akang@tum.de (Anja Kang) 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. -- Amy Ito *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From bivanov@titech.ac.jp Sat Aug 19 13:22:33 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!titech!bivanov From: bivanov@titech.ac.jp (Bruno Ivanov) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug19.132233.9871@titech.ac.jp> Date: Sat, 19 Aug 1995 13:22:33 GMT References: <1995Aug16.133933.8102@inria.fr> <1995Aug17.133833.7547@demon.co.uk> <1995Aug17.152833.5059@tum.de> <1995Aug19.063133.5253@mindspring.com> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Aug19.063133.5253@mindspring.com>, aito@mindspring.com (Amy Ito) 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 Ivanov Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre. ------------------------------------------------------------