From treyes@cmu.edu Wed Oct 23 07:02:21 1996 Path: ashpoly!cascade!brgate!saturno!cmu!treyes From: treyes@cmu.edu (Takeshi Reyes) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Oct23.070221.7357@cmu.edu> Date: Wed, 23 Oct 1996 07:02:21 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 10 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. 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. -- Takeshi Reyes -- Carnegie Mellon University School of CS "We don't sign stars. We build them." From amartinez@stanford.edu Fri Oct 25 04:34:21 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!stanford!amartinez From: amartinez@stanford.edu (Amy Martínez) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Oct25.043421.6730@stanford.edu> Date: Fri, 25 Oct 1996 04:34:21 GMT References: <1996Oct23.070221.7357@cmu.edu> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1996Oct23.070221.7357@cmu.edu>, treyes@cmu.edu (Takeshi Reyes) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. 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! -- Amy Martínez Tape trading list upon request. SASE required for international mail. From jmoreno@unam.mx Sat Oct 26 23:37:21 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!unam!jmoreno From: jmoreno@unam.mx (Joachim Moreno) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Oct26.233721.2079@unam.mx> Date: Sat, 26 Oct 1996 23:37:21 GMT References: <1996Oct23.070221.7357@cmu.edu> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Oct23.070221.7357@cmu.edu>, treyes@cmu.edu (Takeshi Reyes) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Joachim Moreno "Do not worship the copy." 486DX2/66 (Linux 1.2.13) / Linux 1.2.13 From ifischer@inria.fr Sun Oct 27 21:38:21 1996 Path: ashpoly!cascade!brgate!saturno!inria!ifischer From: ifischer@inria.fr (Ines Fischer) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Oct27.213821.6189@inria.fr> Date: Sun, 27 Oct 1996 21:38:21 GMT References: <1996Oct23.070221.7357@cmu.edu> <1996Oct26.233721.2079@unam.mx> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Oct26.233721.2079@unam.mx>, jmoreno@unam.mx (Joachim Moreno) 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. Top-posters will be placed in my ~/.killfile without notice. -- Ines Fischer -- INRIA Rocquencourt "Row 14. No joke."