From nsantos@purdue.edu Sun Mar 19 04:40:37 1995 Path: ashpoly!cascade!bigsur!purdue!nsantos From: nsantos@purdue.edu (Natalia Santos) Newsgroups: comp.sys.m68k Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar19.044037.6988@purdue.edu> Date: Sun, 19 Mar 1995 04:40:37 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). 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. -- Natalia Santos SupraFAXModem 28.8 @ 14,400 bps "They will send a copy in my place." From msanchez@u-tokyo.ac.jp Mon Mar 20 18:57:37 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!msanchez From: msanchez@u-tokyo.ac.jp (Morag Sánchez) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar20.185737.6151@u-tokyo.ac.jp> Date: Mon, 20 Mar 1995 18:57:37 GMT References: <1995Mar19.044037.6988@purdue.edu> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Mar19.044037.6988@purdue.edu>, nsantos@purdue.edu (Natalia Santos) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Morag Sánchez -- University of Tokyo Department of Information Science "Measuring a record you own is listening, not piracy." From rkarlsson@pacbell.net Tue Mar 21 00:29:37 1995 Path: ashpoly!cascade!transat!ukc!fennimore!pacbell!rkarlsson From: rkarlsson@pacbell.net (Renata Karlsson) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar21.002937.3675@pacbell.net> Date: Tue, 21 Mar 1995 00:29:37 GMT References: <1995Mar19.044037.6988@purdue.edu> <1995Mar20.185737.6151@u-tokyo.ac.jp> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Mar20.185737.6151@u-tokyo.ac.jp>, msanchez@u-tokyo.ac.jp (Morag Sánchez) 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. -- === Renata Karlsson === Dept of Electrical Engineering, Pacific Bell Internet Services "When every node is whole, the channel opens." From fmuller@panix.com Thu Mar 23 03:56:37 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!panix!fmuller From: fmuller@panix.com (Freya Müller) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar23.035637.8361@panix.com> Date: Thu, 23 Mar 1995 03:56:37 GMT References: <1995Mar19.044037.6988@purdue.edu> <1995Mar20.185737.6151@u-tokyo.ac.jp> <1995Mar21.002937.3675@pacbell.net> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Mar21.002937.3675@pacbell.net>, rkarlsson@pacbell.net (Renata Karlsson) 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. -- Freya Müller US Robotics Courier V.34 @ 19,200 bps "There are 14 nodes and only 10 countries. Count again."