From lsato@uni-hamburg.de Thu Sep 12 19:41:56 1996
Path: ashpoly!cascade!mxgate!coyoacan!uni-hamburg!lsato
From: lsato@uni-hamburg.de (Liam Sato)
Newsgroups: comp.sys.m68k
Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Sep12.194156.3678@uni-hamburg.de>
Date: Thu, 12 Sep 1996 19:41:56 GMT
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Can a 1989 Mac IIci decode a 40-minute LP in reasonable time?

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.

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

-- 
Liam Sato
Tape trading list upon request. SASE required for international mail.

From mandersson@delphi.com Fri Sep 13 23:43:56 1996
Path: ashpoly!cascade!brgate!saturno!delphi!mandersson
From: mandersson@delphi.com (Mathieu Andersson)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Sep13.234356.9386@delphi.com>
Date: Fri, 13 Sep 1996 23:43:56 GMT
References: <1996Sep12.194156.3678@uni-hamburg.de>
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In article <1996Sep12.194156.3678@uni-hamburg.de>, lsato@uni-hamburg.de (Liam Sato) writes:
> Can a 1989 Mac IIci decode a 40-minute LP in reasonable time?

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

My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise!

-- 
Mathieu Andersson | mandersson@delphi.com
PGP Key fingerprint: 68E7 6864 300B 230B
"Keep the channels open."

From jrobertson@cern.ch Sun Sep 15 04:28:56 1996
Path: ashpoly!cascade!brgate!saturno!cern!jrobertson
From: jrobertson@cern.ch (Jens Robertson)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Sep15.042856.7991@cern.ch>
Date: Sun, 15 Sep 1996 04:28:56 GMT
References: <1996Sep12.194156.3678@uni-hamburg.de> <1996Sep13.234356.9386@delphi.com>
Organization: European Laboratory for Particle Physics, Geneva
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In article <1996Sep13.234356.9386@delphi.com>, mandersson@delphi.com (Mathieu Andersson) writes:
> Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead.
> My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise!

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

-- 
Jens Robertson
Tape trading list upon request. SASE required for international mail.