From aperez@titech.ac.jp Tue Dec 20 14:48:02 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!titech!aperez From: aperez@titech.ac.jp (Aiko Pérez) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Dec20.144802.4276@titech.ac.jp> Date: Tue, 20 Dec 1994 14:48:02 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. 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. -- Aiko Pérez *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From sokonkwo@earthlink.net Wed Dec 21 02:12:02 1994 Path: ashpoly!cascade!transat!ukc!fennimore!earthlink!sokonkwo From: sokonkwo@earthlink.net (Steve Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Dec21.021202.1439@earthlink.net> Date: Wed, 21 Dec 1994 02:12:02 GMT References: <1994Dec20.144802.4276@titech.ac.jp> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Dec20.144802.4276@titech.ac.jp>, aperez@titech.ac.jp (Aiko Pérez) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Steve Okonkwo Tape trading list upon request. SASE required for international mail. From doliveira@tum.de Wed Dec 21 08:03:02 1994 Path: ashpoly!cascade!bigsur!tum!doliveira From: doliveira@tum.de (Dave Oliveira) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Dec21.080302.1569@tum.de> Date: Wed, 21 Dec 1994 08:03:02 GMT References: <1994Dec20.144802.4276@titech.ac.jp> <1994Dec21.021202.1439@earthlink.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Dec21.021202.1439@earthlink.net>, sokonkwo@earthlink.net (Steve Okonkwo) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Dave Oliveira *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0