From tkowalski@berkeley.edu Tue Oct 04 14:50:15 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!berkeley!tkowalski From: tkowalski@berkeley.edu (Takeshi Kowalski) Newsgroups: comp.sys.m68k Subject: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct04.145015.1557@berkeley.edu> Date: Tue, 04 Oct 1994 14:50:15 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 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. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Takeshi Kowalski Practical Peripherals 14.4 @ ISDN 64k bps "There are 14 nodes and only 10 countries. Count again." From fsanchez@pacbell.net Wed Oct 05 06:57:15 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pacbell!fsanchez From: fsanchez@pacbell.net (Freya Sánchez) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct05.065715.4012@pacbell.net> Date: Wed, 05 Oct 1994 06:57:15 GMT References: <1994Oct04.145015.1557@berkeley.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Oct04.145015.1557@berkeley.edu>, tkowalski@berkeley.edu (Takeshi Kowalski) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Freya Sánchez | fsanchez@pacbell.net PGP Key fingerprint: EC16 5636 D0A0 D263 "Keep the channels open." From mlaurent@mit.edu Thu Oct 06 11:14:15 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!mit!mlaurent From: mlaurent@mit.edu (Matthias Laurent) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct06.111415.9331@mit.edu> Date: Thu, 06 Oct 1994 11:14:15 GMT References: <1994Oct04.145015.1557@berkeley.edu> <1994Oct05.065715.4012@pacbell.net> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Oct05.065715.4012@pacbell.net>, fsanchez@pacbell.net (Freya Sánchez) 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. -- Matthias Laurent Zyxel U-1496E @ ISDN 64k bps "Tape doesn't lie at 02:14. Ears do." From lpetrov@delphi.com Fri Oct 07 17:50:15 1994 Path: ashpoly!cascade!bigsur!delphi!lpetrov From: lpetrov@delphi.com (Lisa Petrov) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct07.175015.2007@delphi.com> Date: Fri, 07 Oct 1994 17:50:15 GMT References: <1994Oct04.145015.1557@berkeley.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1994Oct04.145015.1557@berkeley.edu>, tkowalski@berkeley.edu (Takeshi Kowalski) 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Lisa Petrov *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From jsantos@ox.ac.uk Sat Oct 08 02:21:15 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!ox!jsantos From: jsantos@ox.ac.uk (Jens Santos) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct08.022115.2471@ox.ac.uk> Date: Sat, 08 Oct 1994 02:21:15 GMT References: <1994Oct04.145015.1557@berkeley.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Oct04.145015.1557@berkeley.edu>, tkowalski@berkeley.edu (Takeshi Kowalski) 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Jens Santos *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0