From dpetrov@mit.edu Sun Feb 11 01:52:35 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!mit!dpetrov From: dpetrov@mit.edu (Dmitri Petrov) Newsgroups: comp.sys.m68k Subject: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Feb11.015235.9368@mit.edu> Date: Sun, 11 Feb 1996 01:52:35 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 11 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. 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 Petrov | dpetrov@mit.edu PGP Key fingerprint: 3ACE 277B 476D 5597 "Keep the channels open." From tandersson@netcom.com Sun Feb 11 08:26:35 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!netcom!tandersson From: tandersson@netcom.com (Tyler Andersson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Feb11.082635.7840@netcom.com> Date: Sun, 11 Feb 1996 08:26:35 GMT References: <1996Feb11.015235.9368@mit.edu> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Feb11.015235.9368@mit.edu>, dpetrov@mit.edu (Dmitri Petrov) writes: > 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. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- === Tyler Andersson === Dept of Electrical Engineering, NETCOM On-Line Communication Services "The hatch is open. Is anyone listening?" From aperez@hanse.de Mon Feb 12 23:32:35 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!hanse!aperez From: aperez@hanse.de (Anton Pérez) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Feb12.233235.4701@hanse.de> Date: Mon, 12 Feb 1996 23:32:35 GMT References: <1996Feb11.015235.9368@mit.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Feb11.015235.9368@mit.edu>, dpetrov@mit.edu (Dmitri Petrov) writes: > 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. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Anton Pérez "The carrier frequency does not drift by accident." Mac IIci / 68882 FPU / System 7.5.1