From jlopez@illinois.edu Thu Apr 27 12:17:43 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!illinois!jlopez From: jlopez@illinois.edu (Jens López) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr27.121743.6234@illinois.edu> Date: Thu, 27 Apr 1995 12:17:43 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: TIN [version 1.2 PL2] 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. 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. -- Jens López "Tape doesn't lie at 02:14. Ears do." Sun 3/60 (SunOS 4.1.1) / System 7.5.1 From lperez@cern.ch Thu Apr 27 18:10:43 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cern!lperez From: lperez@cern.ch (Lucia Pérez) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr27.181043.5853@cern.ch> Date: Thu, 27 Apr 1995 18:10:43 GMT References: <1995Apr27.121743.6234@illinois.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Apr27.121743.6234@illinois.edu>, jlopez@illinois.edu (Jens López) 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. -- Lucia Pérez SupraFAXModem 28.8 @ 19,200 bps "There are 14 nodes and only 10 countries. Count again."