From jfischer@netcom.com Mon Jun 27 06:18:16 1994 Path: ashpoly!cascade!brgate!saturno!netcom!jfischer From: jfischer@netcom.com (Joachim Fischer) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Jun27.061816.9404@netcom.com> Date: Mon, 27 Jun 1994 06:18:16 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 11 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. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Joachim Fischer Practical Peripherals 14.4 @ 33,600 bps "There are 14 nodes and only 10 countries. Count again." From ktakahashi@demon.co.uk Mon Jun 27 20:41:16 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!ktakahashi From: ktakahashi@demon.co.uk (Kenji Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Jun27.204116.4664@demon.co.uk> Date: Mon, 27 Jun 1994 20:41:16 GMT References: <1994Jun27.061816.9404@netcom.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Jun27.061816.9404@netcom.com>, jfischer@netcom.com (Joachim Fischer) 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. -- Kenji Takahashi Opinions expressed are solely my own and not those of Demon Internet Services UK. ------------------------------------------------------------ From hmoreau@kth.se Tue Jun 28 04:55:16 1994 Path: ashpoly!cascade!mxgate!coyoacan!kth!hmoreau From: hmoreau@kth.se (Hana Moreau) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Jun28.045516.5203@kth.se> Date: Tue, 28 Jun 1994 04:55:16 GMT References: <1994Jun27.061816.9404@netcom.com> <1994Jun27.204116.4664@demon.co.uk> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jun27.204116.4664@demon.co.uk>, ktakahashi@demon.co.uk (Kenji Takahashi) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- === Hana Moreau === Dept of Electrical Engineering, Royal Institute of Technology, Stockholm "Tape doesn't lie at 02:14. Ears do." From ydubois@hanse.de Tue Jun 28 20:35:16 1994 Path: ashpoly!cascade!transat!ukc!fennimore!hanse!ydubois From: ydubois@hanse.de (Yuki Dubois) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Jun28.203516.1407@hanse.de> Date: Tue, 28 Jun 1994 20:35:16 GMT References: <1994Jun27.061816.9404@netcom.com> <1994Jun27.204116.4664@demon.co.uk> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Jun27.204116.4664@demon.co.uk>, ktakahashi@demon.co.uk (Kenji Takahashi) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Yuki Dubois Opinions expressed are solely my own and not those of Hanse-Netzwerk Hamburg. ------------------------------------------------------------