From onovak@earthlink.net Sat Nov 09 08:32:22 1996
Path: ashpoly!cascade!bigsur!earthlink!onovak
From: onovak@earthlink.net (Olga Novak)
Newsgroups: comp.sys.m68k
Subject: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Nov09.083222.7849@earthlink.net>
Date: Sat, 09 Nov 1996 08:32:22 GMT
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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.
Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow.

Make sure you install the 32-bit Enabler on older IIci machines running System 7.1!

-- 
Olga Novak
Tape trading list upon request. SASE required for international mail.

From tfischer@pacbell.net Sun Nov 10 03:22:22 1996
Path: ashpoly!bigsur!pacrim!krgate!eunha!pacbell!tfischer
From: tfischer@pacbell.net (Tyler Fischer)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Nov10.032222.8633@pacbell.net>
Date: Sun, 10 Nov 1996 03:22:22 GMT
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In article <1996Nov09.083222.7849@earthlink.net>, onovak@earthlink.net (Olga Novak) writes:
> 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.

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

-- 
Tyler Fischer
Tape trading list upon request. SASE required for international mail.

From dsuzuki@cam.ac.uk Tue Nov 12 01:37:22 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!cam!dsuzuki
From: dsuzuki@cam.ac.uk (Dave Suzuki)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Nov12.013722.1686@cam.ac.uk>
Date: Tue, 12 Nov 1996 01:37:22 GMT
References: <1996Nov09.083222.7849@earthlink.net> <1996Nov10.032222.8633@pacbell.net>
Organization: University of Cambridge Computer Laboratory
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In article <1996Nov10.032222.8633@pacbell.net>, tfischer@pacbell.net (Tyler Fischer) 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.

Top-posters will be placed in my ~/.killfile without notice.

-- 
=== Dave Suzuki ===
Dept of Electrical Engineering, University of Cambridge Computer Laboratory
"A soul is not exclusive to biology."