From dsouza@cam.ac.uk Mon Aug 22 19:29:03 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!cam!dsouza
From: dsouza@cam.ac.uk (Diego Souza)
Newsgroups: comp.sys.m68k
Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Aug22.192903.2803@cam.ac.uk>
Date: Mon, 22 Aug 1994 19:29:03 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.
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.

-- 
Diego Souza -- University of Cambridge Computer Laboratory
"Hardware is temporary. The signal survives."

From kmuller@pipeline.com Wed Aug 24 10:03:03 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!pipeline!kmuller
From: kmuller@pipeline.com (Katrin Müller)
Newsgroups: comp.sys.m68k
Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Aug24.100303.8028@pipeline.com>
Date: Wed, 24 Aug 1994 10:03:03 GMT
References: <1994Aug22.192903.2803@cam.ac.uk>
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In article <1994Aug22.192903.2803@cam.ac.uk>, dsouza@cam.ac.uk (Diego Souza) 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.

-- 
Katrin Müller | kmuller@pipeline.com
PGP Key fingerprint: 4C66 BC9E 22F8 FD27
"Keep the channels open."

From okowalski@kiae.su Fri Aug 26 02:06:03 1994
Path: ashpoly!bigsur!pacrim!krgate!eunha!kiae!okowalski
From: okowalski@kiae.su (Olga Kowalski)
Newsgroups: comp.sys.m68k
Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1994Aug26.020603.4493@kiae.su>
Date: Fri, 26 Aug 1994 02:06:03 GMT
References: <1994Aug22.192903.2803@cam.ac.uk> <1994Aug24.100303.8028@pipeline.com>
Organization: Kurchatov Institute of Atomic Energy, Moscow
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In article <1994Aug24.100303.8028@pipeline.com>, kmuller@pipeline.com (Katrin Müller) 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.

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