From jgonzalez@pacbell.net Tue May 16 11:43:04 1995 Path: ashpoly!cascade!transat!ukc!fennimore!pacbell!jgonzalez From: jgonzalez@pacbell.net (Joachim González) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995May16.114304.9008@pacbell.net> Date: Tue, 16 May 1995 11:43:04 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? 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! -- Joachim González *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From fokonkwo@tum.de Tue May 16 15:53:04 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!fokonkwo From: fokonkwo@tum.de (Fiona Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995May16.155304.8839@tum.de> Date: Tue, 16 May 1995 15:53:04 GMT References: <1995May16.114304.9008@pacbell.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995May16.114304.9008@pacbell.net>, jgonzalez@pacbell.net (Joachim González) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Fiona Okonkwo *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0