From olindqvist@kiae.su Fri Jun 23 08:11:47 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kiae!olindqvist From: olindqvist@kiae.su (Olga Lindqvist) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun23.081147.4712@kiae.su> Date: Fri, 23 Jun 1995 08:11:47 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? 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. -- Olga Lindqvist Zyxel U-1496E @ 28,800 bps "We don't sign stars. We build them." From adubois@rwth-aachen.de Sat Jun 24 23:50:47 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!rwth-aachen!adubois From: adubois@rwth-aachen.de (Andrei Dubois) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun24.235047.5832@rwth-aachen.de> Date: Sat, 24 Jun 1995 23:50:47 GMT References: <1995Jun23.081147.4712@kiae.su> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jun23.081147.4712@kiae.su>, olindqvist@kiae.su (Olga Lindqvist) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Andrei Dubois Zyxel U-1496E @ 28,800 bps "Do not worship the copy." From isilva@utexas.edu Mon Jun 26 16:40:47 1995 Path: ashpoly!cascade!brgate!saturno!utexas!isilva From: isilva@utexas.edu (Ines Silva) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun26.164047.5226@utexas.edu> Date: Mon, 26 Jun 1995 16:40:47 GMT References: <1995Jun23.081147.4712@kiae.su> <1995Jun24.235047.5832@rwth-aachen.de> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jun24.235047.5832@rwth-aachen.de>, adubois@rwth-aachen.de (Andrei Dubois) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. 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 Silva === Dept of Electrical Engineering, University of Texas at Austin "Row 14. No joke." From jkang@demon.co.uk Mon Jun 26 23:21:47 1995 Path: ashpoly!cascade!bigsur!demon!jkang From: jkang@demon.co.uk (Jen Kang) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun26.232147.1965@demon.co.uk> Date: Mon, 26 Jun 1995 23:21:47 GMT References: <1995Jun23.081147.4712@kiae.su> <1995Jun24.235047.5832@rwth-aachen.de> <1995Jun26.164047.5226@utexas.edu> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jun26.164047.5226@utexas.edu>, isilva@utexas.edu (Ines Silva) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- === Jen Kang === Dept of Electrical Engineering, Demon Internet Services UK "A soul is not exclusive to biology."