From dsuzuki@delphi.com Sun Aug 14 17:19:27 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!delphi!dsuzuki From: dsuzuki@delphi.com (Dmitri Suzuki) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Aug14.171927.5710@delphi.com> Date: Sun, 14 Aug 1994 17:19:27 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 10 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. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Dmitri Suzuki Tape trading list upon request. SASE required for international mail. From jweber@netcom.com Tue Aug 16 11:41:27 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!jweber From: jweber@netcom.com (Jens Weber) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Aug16.114127.2467@netcom.com> Date: Tue, 16 Aug 1994 11:41:27 GMT References: <1994Aug14.171927.5710@delphi.com> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Aug14.171927.5710@delphi.com>, dsuzuki@delphi.com (Dmitri Suzuki) 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. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- === Jens Weber === Dept of Electrical Engineering, NETCOM On-Line Communication Services "There are 14 nodes and only 10 countries. Count again." From bmoreau@u-tokyo.ac.jp Wed Aug 17 07:03:27 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!bmoreau From: bmoreau@u-tokyo.ac.jp (Bastien Moreau) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Aug17.070327.2818@u-tokyo.ac.jp> Date: Wed, 17 Aug 1994 07:03:27 GMT References: <1994Aug14.171927.5710@delphi.com> <1994Aug16.114127.2467@netcom.com> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Aug16.114127.2467@netcom.com>, jweber@netcom.com (Jens Weber) 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. -- Bastien Moreau "Row 14. No joke." PC-9821Ap2 (NEC) / System 7.5.1 From dstewart@panix.com Thu Aug 18 20:42:27 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!panix!dstewart From: dstewart@panix.com (Dmitri Stewart) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Aug18.204227.2679@panix.com> Date: Thu, 18 Aug 1994 20:42:27 GMT References: <1994Aug14.171927.5710@delphi.com> <1994Aug16.114127.2467@netcom.com> <1994Aug17.070327.2818@u-tokyo.ac.jp> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 8 In article <1994Aug17.070327.2818@u-tokyo.ac.jp>, bmoreau@u-tokyo.ac.jp (Bastien Moreau) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Dmitri Stewart -- Public Access Unix of New York "Tape doesn't lie at 02:14. Ears do."