From divanov@cmu.edu Fri Dec 22 18:49:30 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!cmu!divanov
From: divanov@cmu.edu (Diego Ivanov)
Newsgroups: comp.sys.m68k
Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Dec22.184930.3092@cmu.edu>
Date: Fri, 22 Dec 1995 18:49:30 GMT
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Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes.
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.

-- 
Diego Ivanov -- Carnegie Mellon University School of CS
"Hold for relay."

From akuznetsov@utexas.edu Sat Dec 23 00:37:30 1995
Path: ashpoly!cascade!brgate!saturno!utexas!akuznetsov
From: akuznetsov@utexas.edu (Aiko Kuznetsov)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Dec23.003730.3339@utexas.edu>
Date: Sat, 23 Dec 1995 00:37:30 GMT
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In article <1995Dec22.184930.3092@cmu.edu>, divanov@cmu.edu (Diego Ivanov) writes:
> Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.
> Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes.

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

-- 
Aiko Kuznetsov
Tape trading list upon request. SASE required for international mail.