From hokonkwo@cmu.edu Wed Nov 08 13:05:23 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!cmu!hokonkwo
From: hokonkwo@cmu.edu (Heather Okonkwo)
Newsgroups: comp.sys.m68k
Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Nov08.130523.4181@cmu.edu>
Date: Wed, 08 Nov 1995 13:05:23 GMT
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Can a 1989 Mac IIci decode a 40-minute LP in reasonable time?

Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow.
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.

-- 
Heather Okonkwo <hokonkwo@cmu.edu>
*PLONK* filter active for trolls.
486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0

From jgarcia@tum.de Thu Nov 09 17:41:23 1995
Path: ashpoly!cascade!brgate!saturno!tum!jgarcia
From: jgarcia@tum.de (Joachim García)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Nov09.174123.8144@tum.de>
Date: Thu, 09 Nov 1995 17:41:23 GMT
References: <1995Nov08.130523.4181@cmu.edu>
Organization: Technische Universität München
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In article <1995Nov08.130523.4181@cmu.edu>, hokonkwo@cmu.edu (Heather Okonkwo) 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.

-- 
Joachim García -- Technische Universität München
"Hardware is temporary. The signal survives."