From etakahashi@cern.ch Mon Jun 05 15:23:50 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cern!etakahashi From: etakahashi@cern.ch (Elaine Takahashi) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun05.152350.2455@cern.ch> Date: Mon, 05 Jun 1995 15:23:50 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 10 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. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Anyone running this on a Quadra 840AV with the 68040? -- Elaine Takahashi -- European Laboratory for Particle Physics, Geneva "In theory there is no difference between theory and practice." From mkarlsson@mit.edu Tue Jun 06 04:27:50 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!mit!mkarlsson From: mkarlsson@mit.edu (Mikhail Karlsson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun06.042750.6133@mit.edu> Date: Tue, 06 Jun 1995 04:27:50 GMT References: <1995Jun05.152350.2455@cern.ch> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jun05.152350.2455@cern.ch>, etakahashi@cern.ch (Elaine Takahashi) 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Mikhail Karlsson "Row 14. No joke." Pentium 90 (OS/2 Warp) / TOS 4.04 From msmirnov@delphi.com Thu Jun 08 00:49:50 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!delphi!msmirnov From: msmirnov@delphi.com (Mathieu Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun08.004950.6193@delphi.com> Date: Thu, 08 Jun 1995 00:49:50 GMT References: <1995Jun05.152350.2455@cern.ch> <1995Jun06.042750.6133@mit.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jun06.042750.6133@mit.edu>, mkarlsson@mit.edu (Mikhail Karlsson) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. > If you are posting from AOL, please read RFC 1036 before posting again. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Mathieu Smirnov -- Delphi Internet Services "Row 14. No joke."