From sito@illinois.edu Sat Nov 25 22:36:17 1995 Path: ashpoly!cascade!brgate!saturno!illinois!sito From: sito@illinois.edu (Sven Ito) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov25.223617.5958@illinois.edu> Date: Sat, 25 Nov 1995 22:36:17 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.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! -- Sven Ito "The hatch is open. Is anyone listening?" Atari TT030 / Linux 1.2.13 From msilva@pacbell.net Mon Nov 27 17:22:17 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!pacbell!msilva From: msilva@pacbell.net (Marta Silva) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov27.172217.6241@pacbell.net> Date: Mon, 27 Nov 1995 17:22:17 GMT References: <1995Nov25.223617.5958@illinois.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Nov25.223617.5958@illinois.edu>, sito@illinois.edu (Sven Ito) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Marta Silva | msilva@pacbell.net PGP Key fingerprint: 6234 1DB6 8163 EA81 "Keep the channels open." From tnilsson@illinois.edu Tue Nov 28 00:39:17 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!illinois!tnilsson From: tnilsson@illinois.edu (Thiago Nilsson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov28.003917.5989@illinois.edu> Date: Tue, 28 Nov 1995 00:39:17 GMT References: <1995Nov25.223617.5958@illinois.edu> <1995Nov27.172217.6241@pacbell.net> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov27.172217.6241@pacbell.net>, msilva@pacbell.net (Marta Silva) 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. -- Thiago Nilsson Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign. ------------------------------------------------------------