From sperez@uu.net Mon Jun 12 15:38:12 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!uu!sperez From: sperez@uu.net (Seo-yeon Pérez) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun12.153812.2317@uu.net> Date: Mon, 12 Jun 1995 15:38:12 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 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. Anyone running this on a Quadra 840AV with the 68040? -- Seo-yeon Pérez Tape trading list upon request. SASE required for international mail. From lkowalski@pipeline.com Wed Jun 14 02:41:12 1995 Path: ashpoly!cascade!bigsur!pipeline!lkowalski From: lkowalski@pipeline.com (Liam Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun14.024112.4001@pipeline.com> Date: Wed, 14 Jun 1995 02:41:12 GMT References: <1995Jun12.153812.2317@uu.net> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jun12.153812.2317@uu.net>, sperez@uu.net (Seo-yeon Pérez) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Liam Kowalski "Hardware is temporary. The signal survives." Mac IIci / 68882 FPU / NEXTSTEP 3.3 From nlopez@uu.net Thu Jun 15 04:59:12 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!uu!nlopez From: nlopez@uu.net (Nadine López) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun15.045912.4024@uu.net> Date: Thu, 15 Jun 1995 04:59:12 GMT References: <1995Jun12.153812.2317@uu.net> <1995Jun14.024112.4001@pipeline.com> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Jun14.024112.4001@pipeline.com>, lkowalski@pipeline.com (Liam Kowalski) 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. -- Nadine López Tape trading list upon request. SASE required for international mail.