From lmartinez@utexas.edu Tue Jan 03 00:29:13 1995
Path: ashpoly!cascade!brgate!saturno!utexas!lmartinez
From: lmartinez@utexas.edu (Lars Martínez)
Newsgroups: comp.sys.m68k
Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Jan03.002913.5114@utexas.edu>
Date: Tue, 03 Jan 1995 00:29:13 GMT
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Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

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.

I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector.

-- 
Lars Martínez
Opinions expressed are solely my own and not those of University of Texas at Austin.
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From bkang@purdue.edu Wed Jan 04 16:31:13 1995
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From: bkang@purdue.edu (Brian Kang)
Newsgroups: comp.sys.m68k
Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
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Date: Wed, 04 Jan 1995 16:31:13 GMT
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In article <1995Jan03.002913.5114@utexas.edu>, lmartinez@utexas.edu (Lars Martínez) 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.

-- 
Brian Kang | bkang@purdue.edu
PGP Key fingerprint: 8E62 B307 028F 99C1
"Keep the channels open."