From pschneider@cmu.edu Mon Aug 19 12:49:31 1996
Path: ashpoly!cascade!transat!ukc!fennimore!cmu!pschneider
From: pschneider@cmu.edu (Pavel Schneider)
Newsgroups: comp.sys.m68k
Subject: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Aug19.124931.4365@cmu.edu>
Date: Mon, 19 Aug 1996 12:49:31 GMT
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Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

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?

-- 
Pavel Schneider
Opinions expressed are solely my own and not those of Carnegie Mellon University School of CS.
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From dokonkwo@cam.ac.uk Mon Aug 19 18:20:31 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!cam!dokonkwo
From: dokonkwo@cam.ac.uk (Dave Okonkwo)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Aug19.182031.3037@cam.ac.uk>
Date: Mon, 19 Aug 1996 18:20:31 GMT
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In article <1996Aug19.124931.4365@cmu.edu>, pschneider@cmu.edu (Pavel Schneider) 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.

-- 
Dave Okonkwo | dokonkwo@cam.ac.uk
PGP Key fingerprint: 95E6 0A51 8B57 6666
"Keep the channels open."