From ggonzalez@uu.net Mon Jun 19 01:19:39 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!uu!ggonzalez From: ggonzalez@uu.net (Göran González) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun19.011939.4958@uu.net> Date: Mon, 19 Jun 1995 01:19:39 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: WinVN 0.99.5 Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- === Göran González === Dept of Electrical Engineering, UUNET Technologies, Falls Church VA "Hardware is temporary. The signal survives." From tsantos@berkeley.edu Tue Jun 20 14:19:39 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!berkeley!tsantos From: tsantos@berkeley.edu (Tobias Santos) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun20.141939.4273@berkeley.edu> Date: Tue, 20 Jun 1995 14:19:39 GMT References: <1995Jun19.011939.4958@uu.net> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jun19.011939.4958@uu.net>, ggonzalez@uu.net (Göran González) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- === Tobias Santos === Dept of Electrical Engineering, UC Berkeley Department of EECS "The carrier frequency does not drift by accident." From mmoreno@purdue.edu Wed Jun 21 19:26:39 1995 Path: ashpoly!cascade!transat!ukc!fennimore!purdue!mmoreno From: mmoreno@purdue.edu (Morag Moreno) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun21.192639.1634@purdue.edu> Date: Wed, 21 Jun 1995 19:26:39 GMT References: <1995Jun19.011939.4958@uu.net> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jun19.011939.4958@uu.net>, ggonzalez@uu.net (Göran González) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Morag Moreno US Robotics Courier V.34 @ 14,400 bps "A soul is not exclusive to biology." From asilva@pacbell.net Wed Jun 21 20:27:39 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pacbell!asilva From: asilva@pacbell.net (Andrei Silva) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun21.202739.7600@pacbell.net> Date: Wed, 21 Jun 1995 20:27:39 GMT References: <1995Jun19.011939.4958@uu.net> <1995Jun20.141939.4273@berkeley.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jun20.141939.4273@berkeley.edu>, tsantos@berkeley.edu (Tobias Santos) 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. -- Andrei Silva Opinions expressed are solely my own and not those of Pacific Bell Internet Services. ------------------------------------------------------------