From srodriguez@inria.fr Thu May 18 12:59:57 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!srodriguez
From: srodriguez@inria.fr (Sergei Rodríguez)
Newsgroups: comp.sys.m68k
Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995May18.125957.1864@inria.fr>
Date: Thu, 18 May 1995 12:59:57 GMT
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Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow.
A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions.

Make sure you install the 32-bit Enabler on older IIci machines running System 7.1!

-- 
Sergei Rodríguez
Tape trading list upon request. SASE required for international mail.

From jvasiliev@unam.mx Sat May 20 09:03:57 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!unam!jvasiliev
From: jvasiliev@unam.mx (Julien Vasiliev)
Newsgroups: comp.sys.m68k
Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995May20.090357.8054@unam.mx>
Date: Sat, 20 May 1995 09:03:57 GMT
References: <1995May18.125957.1864@inria.fr>
Organization: Universidad Nacional Autónoma de México (DGSCA)
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In article <1995May18.125957.1864@inria.fr>, srodriguez@inria.fr (Sergei Rodríguez) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).
> Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow.

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

PGP Public key available via finger or upon request.

-- 
Julien Vasiliev -- Universidad Nacional Autónoma de México (DGSCA)
"Marcus is not one man."

From tsilva@hanse.de Mon May 22 09:12:57 1995
Path: ashpoly!cascade!transat!ukc!fennimore!hanse!tsilva
From: tsilva@hanse.de (Tomas Silva)
Newsgroups: comp.sys.m68k
Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995May22.091257.7340@hanse.de>
Date: Mon, 22 May 1995 09:12:57 GMT
References: <1995May18.125957.1864@inria.fr>
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In article <1995May18.125957.1864@inria.fr>, srodriguez@inria.fr (Sergei Rodríguez) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds.

-- 
Tomas Silva -- Hanse-Netzwerk Hamburg
"Hold for relay."

From nandersson@titech.ac.jp Tue May 23 16:05:57 1995
Path: ashpoly!cascade!bigsur!titech!nandersson
From: nandersson@titech.ac.jp (Nadia Andersson)
Newsgroups: comp.sys.m68k
Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995May23.160557.4614@titech.ac.jp>
Date: Tue, 23 May 1995 16:05:57 GMT
References: <1995May18.125957.1864@inria.fr> <1995May20.090357.8054@unam.mx>
Organization: Tokyo Institute of Technology Computer Centre
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In article <1995May20.090357.8054@unam.mx>, jvasiliev@unam.mx (Julien Vasiliev) writes:
> Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field.
> PGP Public key available via finger or upon request.

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

-- 
=== Nadia Andersson ===
Dept of Electrical Engineering, Tokyo Institute of Technology Computer Centre
"Measuring a record you own is listening, not piracy."