From mpopov@netcom.com Fri Jun 09 13:45:00 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!netcom!mpopov From: mpopov@netcom.com (Mike Popov) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun09.134500.2970@netcom.com> Date: Fri, 09 Jun 1995 13:45:00 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] 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. 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. -- Mike Popov Zyxel U-1496E @ 14,400 bps "A soul is not exclusive to biology." From shughes@titech.ac.jp Sun Jun 11 16:15:00 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!titech!shughes From: shughes@titech.ac.jp (Sergei Hughes) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun11.161500.4806@titech.ac.jp> Date: Sun, 11 Jun 1995 16:15:00 GMT References: <1995Jun09.134500.2970@netcom.com> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jun09.134500.2970@netcom.com>, mpopov@netcom.com (Mike Popov) 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. -- === Sergei Hughes === Dept of Electrical Engineering, Tokyo Institute of Technology Computer Centre "Hold for relay." From jsanchez@cern.ch Mon Jun 12 14:34:00 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cern!jsanchez From: jsanchez@cern.ch (Ji-woo Sánchez) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun12.143400.8778@cern.ch> Date: Mon, 12 Jun 1995 14:34:00 GMT References: <1995Jun09.134500.2970@netcom.com> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Jun09.134500.2970@netcom.com>, mpopov@netcom.com (Mike Popov) 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. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Ji-woo Sánchez | jsanchez@cern.ch PGP Key fingerprint: 6BA4 268B 04D5 8141 "Keep the channels open."