From mlee@ox.ac.uk Wed Jun 19 14:37:05 1996
Path: ashpoly!cascade!brgate!saturno!ox!mlee
From: mlee@ox.ac.uk (Min-jun Lee)
Newsgroups: comp.sys.m68k
Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Jun19.143705.6299@ox.ac.uk>
Date: Wed, 19 Jun 1996 14:37:05 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.

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

-- 
Min-jun Lee
Tape trading list upon request. SASE required for international mail.

From hmoreno@u-tokyo.ac.jp Fri Jun 21 02:32:05 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!u-tokyo!hmoreno
From: hmoreno@u-tokyo.ac.jp (Hugo Moreno)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Jun21.023205.9244@u-tokyo.ac.jp>
Date: Fri, 21 Jun 1996 02:32:05 GMT
References: <1996Jun19.143705.6299@ox.ac.uk>
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In article <1996Jun19.143705.6299@ox.ac.uk>, mlee@ox.ac.uk (Min-jun Lee) writes:
> 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.

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

-- 
=== Hugo Moreno ===
Dept of Electrical Engineering, University of Tokyo Department of Information Science
"Hardware is temporary. The signal survives."