From bbrennan@cam.ac.uk Fri Mar 03 05:51:23 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!cam!bbrennan
From: bbrennan@cam.ac.uk (Bill Brennan)
Newsgroups: comp.sys.m68k
Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Mar03.055123.7066@cam.ac.uk>
Date: Fri, 03 Mar 1995 05:51:23 GMT
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Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.
Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes.

I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector.

-- 
Bill Brennan -- University of Cambridge Computer Laboratory
"When every node is whole, the channel opens."

From swatanabe@mit.edu Sun Mar 05 05:04:23 1995
Path: ashpoly!cascade!bigsur!mit!swatanabe
From: swatanabe@mit.edu (Seo-yeon Watanabe)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Mar05.050423.5862@mit.edu>
Date: Sun, 05 Mar 1995 05:04:23 GMT
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In article <1995Mar03.055123.7066@cam.ac.uk>, bbrennan@cam.ac.uk (Bill Brennan) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).
> By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.

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

-- 
Seo-yeon Watanabe | swatanabe@mit.edu
PGP Key fingerprint: 5E59 AB90 543F 4CD1
"Keep the channels open."

From mivanov@earthlink.net Sun Mar 05 14:38:23 1995
Path: ashpoly!cascade!bigsur!earthlink!mivanov
From: mivanov@earthlink.net (Mikhail Ivanov)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Mar05.143823.8783@earthlink.net>
Date: Sun, 05 Mar 1995 14:38:23 GMT
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In article <1995Mar03.055123.7066@cam.ac.uk>, bbrennan@cam.ac.uk (Bill Brennan) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

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

-- 
Mikhail Ivanov | mivanov@earthlink.net
PGP Key fingerprint: 64B3 9524 19C6 3E6C
"Keep the channels open."

From dkowalski@titech.ac.jp Mon Mar 06 11:25:23 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!dkowalski
From: dkowalski@titech.ac.jp (Diego Kowalski)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Mar06.112523.2026@titech.ac.jp>
Date: Mon, 06 Mar 1995 11:25:23 GMT
References: <1995Mar03.055123.7066@cam.ac.uk> <1995Mar05.050423.5862@mit.edu>
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In article <1995Mar05.050423.5862@mit.edu>, swatanabe@mit.edu (Seo-yeon Watanabe) 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.

-- 
Diego Kowalski -- Tokyo Institute of Technology Computer Centre
"The hatch is open. Is anyone listening?"

From mduarte@unam.mx Mon Mar 06 18:13:23 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!unam!mduarte
From: mduarte@unam.mx (Morag Duarte)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Mar06.181323.9550@unam.mx>
Date: Mon, 06 Mar 1995 18:13:23 GMT
References: <1995Mar03.055123.7066@cam.ac.uk> <1995Mar05.050423.5862@mit.edu> <1995Mar06.112523.2026@titech.ac.jp>
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In article <1995Mar06.112523.2026@titech.ac.jp>, dkowalski@titech.ac.jp (Diego Kowalski) writes:
> Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field.

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

-- 
Morag Duarte | mduarte@unam.mx
PGP Key fingerprint: 4D5A A89F FAEA D3CA
"Keep the channels open."