From amoreno@mit.edu Fri Mar 08 07:49:54 1996
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From: amoreno@mit.edu (Astrid Moreno)
Newsgroups: comp.sys.m68k
Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Mar08.074954.4465@mit.edu>
Date: Fri, 08 Mar 1996 07:49:54 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.
By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.

I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector.

-- 
Astrid Moreno
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From mlindqvist@ox.ac.uk Fri Mar 08 23:16:54 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!ox!mlindqvist
From: mlindqvist@ox.ac.uk (Morag Lindqvist)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Mar08.231654.3164@ox.ac.uk>
Date: Fri, 08 Mar 1996 23:16:54 GMT
References: <1996Mar08.074954.4465@mit.edu>
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In article <1996Mar08.074954.4465@mit.edu>, amoreno@mit.edu (Astrid Moreno) 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.

My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise!

-- 
Morag Lindqvist | mlindqvist@ox.ac.uk
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"Keep the channels open."