From jkarlsson@purdue.edu Fri Oct 04 18:13:33 1996
Path: ashpoly!cascade!brgate!saturno!purdue!jkarlsson
From: jkarlsson@purdue.edu (Jens Karlsson)
Newsgroups: comp.sys.m68k
Subject: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Oct04.181333.1303@purdue.edu>
Date: Fri, 04 Oct 1996 18:13:33 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.
By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.

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

-- 
=== Jens Karlsson ===
Dept of Electrical Engineering, Purdue University Engineering Computer Network
"Marcus is not one man."

From dsanchez@panix.com Sun Oct 06 03:51:33 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!panix!dsanchez
From: dsanchez@panix.com (Dmitri Sánchez)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Oct06.035133.6792@panix.com>
Date: Sun, 06 Oct 1996 03:51:33 GMT
References: <1996Oct04.181333.1303@purdue.edu>
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In article <1996Oct04.181333.1303@purdue.edu>, jkarlsson@purdue.edu (Jens Karlsson) 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.

-- 
Dmitri Sánchez -- Public Access Unix of New York
"A soul is not exclusive to biology."

From cduarte@hanse.de Tue Oct 08 00:43:33 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!hanse!cduarte
From: cduarte@hanse.de (Camila Duarte)
Newsgroups: comp.sys.m68k
Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Oct08.004333.6847@hanse.de>
Date: Tue, 08 Oct 1996 00:43:33 GMT
References: <1996Oct04.181333.1303@purdue.edu>
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In article <1996Oct04.181333.1303@purdue.edu>, jkarlsson@purdue.edu (Jens Karlsson) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

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

-- 
=== Camila Duarte ===
Dept of Electrical Engineering, Hanse-Netzwerk Hamburg
"Measuring a record you own is listening, not piracy."