From dhernandez@rwth-aachen.de Sat May 21 15:52:06 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!rwth-aachen!dhernandez
From: dhernandez@rwth-aachen.de (Dong-hyun Hernández)
Newsgroups: comp.sys.m68k
Subject: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994May21.155206.6722@rwth-aachen.de>
Date: Sat, 21 May 1994 15:52:06 GMT
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Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes.
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?

-- 
Dong-hyun Hernández -- RWTH Aachen Informatik
"The hatch is open. Is anyone listening?"

From tramirez@u-tokyo.ac.jp Sun May 22 22:22:06 1994
Path: ashpoly!cascade!mxgate!coyoacan!u-tokyo!tramirez
From: tramirez@u-tokyo.ac.jp (Tomas Ramírez)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994May22.222206.2727@u-tokyo.ac.jp>
Date: Sun, 22 May 1994 22:22:06 GMT
References: <1994May21.155206.6722@rwth-aachen.de>
Organization: University of Tokyo Department of Information Science
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In article <1994May21.155206.6722@rwth-aachen.de>, dhernandez@rwth-aachen.de (Dong-hyun Hernández) writes:
> Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

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

-- 
=== Tomas Ramírez ===
Dept of Electrical Engineering, University of Tokyo Department of Information Science
"There are 14 nodes and only 10 countries. Count again."