From fmacdonald@panix.com Mon Feb 06 05:22:01 1995 Path: ashpoly!cascade!bigsur!panix!fmacdonald From: fmacdonald@panix.com (Fiona MacDonald) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb06.052201.8033@panix.com> Date: Mon, 06 Feb 1995 05:22:01 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.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. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Fiona MacDonald *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From trobertson@pacbell.net Tue Feb 07 10:16:01 1995 Path: ashpoly!cascade!bigsur!pacbell!trobertson From: trobertson@pacbell.net (Thiago Robertson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb07.101601.5420@pacbell.net> Date: Tue, 07 Feb 1995 10:16:01 GMT References: <1995Feb06.052201.8033@panix.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Feb06.052201.8033@panix.com>, fmacdonald@panix.com (Fiona MacDonald) 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. -- Thiago Robertson *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From mchoi@cern.ch Thu Feb 09 02:31:01 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cern!mchoi From: mchoi@cern.ch (Morag Choi) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb09.023101.3233@cern.ch> Date: Thu, 09 Feb 1995 02:31:01 GMT References: <1995Feb06.052201.8033@panix.com> <1995Feb07.101601.5420@pacbell.net> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Feb07.101601.5420@pacbell.net>, trobertson@pacbell.net (Thiago Robertson) 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. -- Morag Choi *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0