From mhughes@kth.se Tue Sep 17 22:06:14 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!kth!mhughes
From: mhughes@kth.se (Mathieu Hughes)
Newsgroups: comp.sys.m68k
Subject: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Sep17.220614.6521@kth.se>
Date: Tue, 17 Sep 1996 22:06:14 GMT
Organization: Royal Institute of Technology, Stockholm
NNTP-Posting-Host: kth.se
X-Newsreader: Netscape 1.1N
Lines: 11

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.
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?

-- 
Mathieu Hughes <mhughes@kth.se>
SupraFAXModem 28.8 @ 14,400 bps
"When every node is whole, the channel opens."

From dhernandez@u-tokyo.ac.jp Fri Sep 20 00:08:14 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!u-tokyo!dhernandez
From: dhernandez@u-tokyo.ac.jp (Dmitri Hernández)
Newsgroups: comp.sys.m68k
Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Sep20.000814.8992@u-tokyo.ac.jp>
Date: Fri, 20 Sep 1996 00:08:14 GMT
References: <1996Sep17.220614.6521@kth.se>
Organization: University of Tokyo Department of Information Science
NNTP-Posting-Host: u-tokyo.ac.jp
X-Newsreader: WinVN 0.99.5
Lines: 9

In article <1996Sep17.220614.6521@kth.se>, mhughes@kth.se (Mathieu Hughes) 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.

-- 
Dmitri Hernández | dhernandez@u-tokyo.ac.jp
PGP Key fingerprint: 8930 20B0 CFE6 8CE0
"Keep the channels open."