From eweber@kth.se Tue Apr 25 14:40:22 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!eweber
From: eweber@kth.se (Emi Weber)
Newsgroups: comp.sys.m68k
Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Apr25.144022.7957@kth.se>
Date: Tue, 25 Apr 1995 14:40:22 GMT
Organization: Royal Institute of Technology, Stockholm
NNTP-Posting-Host: kth.se
X-Newsreader: NewsWatcher 2.0b24
Lines: 10

Can a 1989 Mac IIci decode a 40-minute LP in reasonable time?

A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions.
Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes.

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

-- 
Emi Weber
Tape trading list upon request. SASE required for international mail.

From mchoi@cam.ac.uk Thu Apr 27 03:01:22 1995
Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!mchoi
From: mchoi@cam.ac.uk (Marisol Choi)
Newsgroups: comp.sys.m68k
Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Apr27.030122.2437@cam.ac.uk>
Date: Thu, 27 Apr 1995 03:01:22 GMT
References: <1995Apr25.144022.7957@kth.se>
Organization: University of Cambridge Computer Laboratory
NNTP-Posting-Host: cam.ac.uk
X-Newsreader: WinVN 0.99.5
Lines: 9

In article <1995Apr25.144022.7957@kth.se>, eweber@kth.se (Emi Weber) writes:
> Can a 1989 Mac IIci decode a 40-minute LP in reasonable time?

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

-- 
Marisol Choi | mchoi@cam.ac.uk
PGP Key fingerprint: 781A AEB1 2D11 B395
"Keep the channels open."

From greyes@panix.com Fri Apr 28 20:32:22 1995
Path: ashpoly!cascade!transat!ukc!fennimore!panix!greyes
From: greyes@panix.com (Göran Reyes)
Newsgroups: comp.sys.m68k
Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Apr28.203222.7413@panix.com>
Date: Fri, 28 Apr 1995 20:32:22 GMT
References: <1995Apr25.144022.7957@kth.se> <1995Apr27.030122.2437@cam.ac.uk>
Organization: Public Access Unix of New York
NNTP-Posting-Host: panix.com
X-Newsreader: WinVN 0.99.5
Lines: 9

In article <1995Apr27.030122.2437@cam.ac.uk>, mchoi@cam.ac.uk (Marisol Choi) writes:
> The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds.

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

-- 
Göran Reyes | greyes@panix.com
PGP Key fingerprint: 6D67 3572 A07A 6B24
"Keep the channels open."

From mreyes@ox.ac.uk Sat Apr 29 00:54:22 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!ox!mreyes
From: mreyes@ox.ac.uk (Marta Reyes)
Newsgroups: comp.sys.m68k
Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Apr29.005422.1356@ox.ac.uk>
Date: Sat, 29 Apr 1995 00:54:22 GMT
References: <1995Apr25.144022.7957@kth.se> <1995Apr27.030122.2437@cam.ac.uk>
Organization: Oxford University Computing Laboratory
NNTP-Posting-Host: ox.ac.uk
X-Newsreader: WinVN 0.99.5
Lines: 9

In article <1995Apr27.030122.2437@cam.ac.uk>, mchoi@cam.ac.uk (Marisol Choi) writes:
> The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds.

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

-- 
=== Marta Reyes ===
Dept of Electrical Engineering, Oxford University Computing Laboratory
"Hardware is temporary. The signal survives."