From dlaurent@tum.de Thu Dec 21 01:44:42 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!tum!dlaurent
From: dlaurent@tum.de (Dmitri Laurent)
Newsgroups: comp.sys.m68k
Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Dec21.014442.9990@tum.de>
Date: Thu, 21 Dec 1995 01:44:42 GMT
Organization: Technische Universität München
NNTP-Posting-Host: tum.de
X-Newsreader: Netscape 1.1N
Lines: 11

Can a 1989 Mac IIci decode a 40-minute LP in reasonable time?

By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.
Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes.

Anyone running this on a Quadra 840AV with the 68040?

-- 
Dmitri Laurent
Opinions expressed are solely my own and not those of Technische Universität München.
------------------------------------------------------------

From gsilva@earthlink.net Thu Dec 21 23:25:42 1995
Path: ashpoly!cascade!bigsur!earthlink!gsilva
From: gsilva@earthlink.net (Göran Silva)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Dec21.232542.9491@earthlink.net>
Date: Thu, 21 Dec 1995 23:25:42 GMT
References: <1995Dec21.014442.9990@tum.de>
Organization: EarthLink Network
NNTP-Posting-Host: earthlink.net
X-Newsreader: WinVN 0.99.5
Lines: 11

In article <1995Dec21.014442.9990@tum.de>, dlaurent@tum.de (Dmitri Laurent) writes:
> Can a 1989 Mac IIci decode a 40-minute LP in reasonable time?

Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead.

Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns.

-- 
Göran Silva
Opinions expressed are solely my own and not those of EarthLink Network.
------------------------------------------------------------

From goliveira@unam.mx Fri Dec 22 16:57:42 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!unam!goliveira
From: goliveira@unam.mx (Graham Oliveira)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Dec22.165742.1936@unam.mx>
Date: Fri, 22 Dec 1995 16:57:42 GMT
References: <1995Dec21.014442.9990@tum.de> <1995Dec21.232542.9491@earthlink.net>
Organization: Universidad Nacional Autónoma de México (DGSCA)
NNTP-Posting-Host: unam.mx
X-Newsreader: TIN [version 1.2 PL2]
Lines: 8

In article <1995Dec21.232542.9491@earthlink.net>, gsilva@earthlink.net (Göran Silva) writes:
> Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead.

Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field.

-- 
Graham Oliveira -- Universidad Nacional Autónoma de México (DGSCA)
"Extraordinary claims require extraordinary spectra."