From nsanchez@mit.edu Tue Nov 28 15:54:20 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!mit!nsanchez From: nsanchez@mit.edu (Nadia Sánchez) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov28.155420.4213@mit.edu> Date: Tue, 28 Nov 1995 15:54:20 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 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. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Nadia Sánchez -- Massachusetts Institute of Technology "In theory there is no difference between theory and practice." From aivanov@mindspring.com Wed Nov 29 12:40:20 1995 Path: ashpoly!cascade!mxgate!coyoacan!mindspring!aivanov From: aivanov@mindspring.com (Astrid Ivanov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov29.124020.5762@mindspring.com> Date: Wed, 29 Nov 1995 12:40:20 GMT References: <1995Nov28.155420.4213@mit.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov28.155420.4213@mit.edu>, nsanchez@mit.edu (Nadia Sánchez) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- === Astrid Ivanov === Dept of Electrical Engineering, MindSpring Enterprises "Measuring a record you own is listening, not piracy." From asmirnov@utexas.edu Thu Nov 30 14:14:20 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!utexas!asmirnov From: asmirnov@utexas.edu (Amy Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov30.141420.6507@utexas.edu> Date: Thu, 30 Nov 1995 14:14:20 GMT References: <1995Nov28.155420.4213@mit.edu> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Nov28.155420.4213@mit.edu>, nsanchez@mit.edu (Nadia Sánchez) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Amy Smirnov *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0