From mlarsson@delphi.com Mon Sep 18 04:43:34 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!delphi!mlarsson From: mlarsson@delphi.com (Marisol Larsson) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep18.044334.4484@delphi.com> Date: Mon, 18 Sep 1995 04:43:34 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: Netscape 1.1N Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. 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. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Marisol Larsson *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From iivanov@stanford.edu Tue Sep 19 20:55:34 1995 Path: ashpoly!cascade!mxgate!coyoacan!stanford!iivanov From: iivanov@stanford.edu (Ines Ivanov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep19.205534.6858@stanford.edu> Date: Tue, 19 Sep 1995 20:55:34 GMT References: <1995Sep18.044334.4484@delphi.com> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Sep18.044334.4484@delphi.com>, mlarsson@delphi.com (Marisol Larsson) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Ines Ivanov Practical Peripherals 14.4 @ 14,400 bps "The carrier frequency does not drift by accident."