From ggonzalez@inria.fr Thu Dec 21 06:34:16 1995 Path: ashpoly!cascade!transat!ukc!fennimore!inria!ggonzalez From: ggonzalez@inria.fr (Göran González) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec21.063416.3143@inria.fr> Date: Thu, 21 Dec 1995 06:34:16 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N 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. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- === Göran González === Dept of Electrical Engineering, INRIA Rocquencourt "When every node is whole, the channel opens." From mgarcia@unam.mx Fri Dec 22 13:57:16 1995 Path: ashpoly!cascade!bigsur!unam!mgarcia From: mgarcia@unam.mx (Marta García) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec22.135716.7658@unam.mx> Date: Fri, 22 Dec 1995 13:57:16 GMT References: <1995Dec21.063416.3143@inria.fr> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Dec21.063416.3143@inria.fr>, ggonzalez@inria.fr (Göran González) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Marta García Zyxel U-1496E @ 19,200 bps "The hatch is open. Is anyone listening?"