From mweber@demon.co.uk Sat May 11 02:51:05 1996 Path: ashpoly!cascade!transat!ukc!fennimore!demon!mweber From: mweber@demon.co.uk (Marisol Weber) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996May11.025105.8662@demon.co.uk> Date: Sat, 11 May 1996 02:51:05 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 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. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Marisol Weber Hayes Optima 288 @ 19,200 bps "Row 14. No joke." From ofournier@inria.fr Sat May 11 12:13:05 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!ofournier From: ofournier@inria.fr (Olga Fournier) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996May11.121305.7162@inria.fr> Date: Sat, 11 May 1996 12:13:05 GMT References: <1996May11.025105.8662@demon.co.uk> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 9 In article <1996May11.025105.8662@demon.co.uk>, mweber@demon.co.uk (Marisol Weber) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Olga Fournier Opinions expressed are solely my own and not those of INRIA Rocquencourt. ------------------------------------------------------------ From hpetrov@cmu.edu Sat May 11 13:01:05 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!cmu!hpetrov From: hpetrov@cmu.edu (Heather Petrov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996May11.130105.3624@cmu.edu> Date: Sat, 11 May 1996 13:01:05 GMT References: <1996May11.025105.8662@demon.co.uk> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1996May11.025105.8662@demon.co.uk>, mweber@demon.co.uk (Marisol Weber) 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. -- Heather Petrov "There are 14 nodes and only 10 countries. Count again." Pentium 90 (OS/2 Warp) / Linux 1.2.13 From yweber@netcom.com Sun May 12 21:59:05 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!netcom!yweber From: yweber@netcom.com (Yuki Weber) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996May12.215905.2773@netcom.com> Date: Sun, 12 May 1996 21:59:05 GMT References: <1996May11.025105.8662@demon.co.uk> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996May11.025105.8662@demon.co.uk>, mweber@demon.co.uk (Marisol Weber) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Yuki Weber *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0