From asmirnov@netcom.com Wed Sep 21 16:18:46 1994 Path: ashpoly!cascade!transat!ukc!fennimore!netcom!asmirnov From: asmirnov@netcom.com (Astrid Smirnov) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Sep21.161846.2685@netcom.com> Date: Wed, 21 Sep 1994 16:18:46 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. -- Astrid Smirnov *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0 From dsouza@panix.com Fri Sep 23 09:22:46 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!panix!dsouza From: dsouza@panix.com (Diego Souza) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Sep23.092246.8939@panix.com> Date: Fri, 23 Sep 1994 09:22:46 GMT References: <1994Sep21.161846.2685@netcom.com> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Sep21.161846.2685@netcom.com>, asmirnov@netcom.com (Astrid Smirnov) writes: > 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. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Diego Souza -- Public Access Unix of New York "They will send a copy in my place."