From chernandez@inria.fr Sun Oct 09 06:21:48 1994 Path: ashpoly!cascade!transat!ukc!fennimore!inria!chernandez From: chernandez@inria.fr (Camila Hernández) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct09.062148.9604@inria.fr> Date: Sun, 09 Oct 1994 06:21:48 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Camila Hernández Opinions expressed are solely my own and not those of INRIA Rocquencourt. ------------------------------------------------------------ From ttanaka@utexas.edu Mon Oct 10 00:38:48 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!utexas!ttanaka From: ttanaka@utexas.edu (Tomas Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct10.003848.6561@utexas.edu> Date: Mon, 10 Oct 1994 00:38:48 GMT References: <1994Oct09.062148.9604@inria.fr> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Oct09.062148.9604@inria.fr>, chernandez@inria.fr (Camila Hernández) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Tomas Tanaka -- University of Texas at Austin "There are 14 nodes and only 10 countries. Count again." From mdubois@uu.net Tue Oct 11 16:47:48 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!uu!mdubois From: mdubois@uu.net (Marisol Dubois) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct11.164748.7705@uu.net> Date: Tue, 11 Oct 1994 16:47:48 GMT References: <1994Oct09.062148.9604@inria.fr> <1994Oct10.003848.6561@utexas.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Oct10.003848.6561@utexas.edu>, ttanaka@utexas.edu (Tomas Tanaka) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Marisol Dubois *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0