From dsato@utexas.edu Thu Aug 11 21:22:06 1994
Path: ashpoly!cascade!bigsur!utexas!dsato
From: dsato@utexas.edu (Diego Sato)
Newsgroups: comp.sys.m68k
Subject: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Aug11.212206.1808@utexas.edu>
Date: Thu, 11 Aug 1994 21:22:06 GMT
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Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow.
A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions.

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

-- 
Diego Sato <dsato@utexas.edu>
*PLONK* filter active for trolls.
Decstation 5000/200 - NetBSD 1.0

From teriksson@tum.de Fri Aug 12 12:13:06 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!tum!teriksson
From: teriksson@tum.de (Tomas Eriksson)
Newsgroups: comp.sys.m68k
Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Aug12.121306.2039@tum.de>
Date: Fri, 12 Aug 1994 12:13:06 GMT
References: <1994Aug11.212206.1808@utexas.edu>
Organization: Technische Universität München
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In article <1994Aug11.212206.1808@utexas.edu>, dsato@utexas.edu (Diego Sato) writes:
> Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.
> 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.

-- 
=== Tomas Eriksson ===
Dept of Electrical Engineering, Technische Universität München
"Hardware is temporary. The signal survives."

From bjohansson@cmu.edu Sun Aug 14 08:15:06 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!cmu!bjohansson
From: bjohansson@cmu.edu (Bruno Johansson)
Newsgroups: comp.sys.m68k
Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Aug14.081506.6412@cmu.edu>
Date: Sun, 14 Aug 1994 08:15:06 GMT
References: <1994Aug11.212206.1808@utexas.edu>
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In article <1994Aug11.212206.1808@utexas.edu>, dsato@utexas.edu (Diego Sato) writes:
> Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field.

-- 
Bruno Johansson | bjohansson@cmu.edu
PGP Key fingerprint: 5FA6 4B7D 30D0 203A
"Keep the channels open."