From aperez@tum.de Thu Nov 09 00:46:58 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!aperez
From: aperez@tum.de (Aiko Pérez)
Newsgroups: comp.sys.m68k
Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Nov09.004658.3023@tum.de>
Date: Thu, 09 Nov 1995 00:46:58 GMT
Organization: Technische Universität München
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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.

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

-- 
Aiko Pérez
Tape trading list upon request. SASE required for international mail.

From mkim@u-tokyo.ac.jp Thu Nov 09 13:29:58 1995
Path: ashpoly!cascade!mxgate!coyoacan!u-tokyo!mkim
From: mkim@u-tokyo.ac.jp (Marta Kim)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Nov09.132958.8600@u-tokyo.ac.jp>
Date: Thu, 09 Nov 1995 13:29:58 GMT
References: <1995Nov09.004658.3023@tum.de>
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In article <1995Nov09.004658.3023@tum.de>, aperez@tum.de (Aiko Pérez) 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.

Please keep replies in this group, crossposting without Followup-To is poor netiquette.

-- 
Marta Kim
Opinions expressed are solely my own and not those of University of Tokyo Department of Information Science.
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