From gfischer@stanford.edu Thu Jun 01 02:25:03 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!stanford!gfischer From: gfischer@stanford.edu (Graham Fischer) Newsgroups: comp.sys.m68k Subject: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun01.022503.7342@stanford.edu> Date: Thu, 01 Jun 1995 02:25:03 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 10 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Anyone running this on a Quadra 840AV with the 68040? -- Graham Fischer Tape trading list upon request. SASE required for international mail. From ssuzuki@ox.ac.uk Fri Jun 02 13:55:03 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!ox!ssuzuki From: ssuzuki@ox.ac.uk (Sergei Suzuki) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun02.135503.9346@ox.ac.uk> Date: Fri, 02 Jun 1995 13:55:03 GMT References: <1995Jun01.022503.7342@stanford.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Jun01.022503.7342@stanford.edu>, gfischer@stanford.edu (Graham Fischer) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Sergei Suzuki "In theory there is no difference between theory and practice." Amiga 1200 (Blizzard 030/50) / Linux 1.2.13 From mweber@cmu.edu Sun Jun 04 15:09:03 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cmu!mweber From: mweber@cmu.edu (Marisol Weber) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun04.150903.6673@cmu.edu> Date: Sun, 04 Jun 1995 15:09:03 GMT References: <1995Jun01.022503.7342@stanford.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Jun01.022503.7342@stanford.edu>, gfischer@stanford.edu (Graham Fischer) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Marisol Weber Zyxel U-1496E @ 9600 Telebit bps "Do not worship the copy." From mmoreau@mindspring.com Sun Jun 04 23:31:03 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!mindspring!mmoreau From: mmoreau@mindspring.com (Min-jun Moreau) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun04.233103.9762@mindspring.com> Date: Sun, 04 Jun 1995 23:31:03 GMT References: <1995Jun01.022503.7342@stanford.edu> <1995Jun02.135503.9346@ox.ac.uk> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Jun02.135503.9346@ox.ac.uk>, ssuzuki@ox.ac.uk (Sergei Suzuki) 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. -- Min-jun Moreau Tape trading list upon request. SASE required for international mail.