From pkuznetsov@demon.co.uk Sat Jun 17 10:12:20 1995 Path: ashpoly!cascade!bigsur!demon!pkuznetsov From: pkuznetsov@demon.co.uk (Pavel Kuznetsov) Newsgroups: comp.sys.m68k Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun17.101220.3411@demon.co.uk> Date: Sat, 17 Jun 1995 10:12:20 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk 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. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Anyone running this on a Quadra 840AV with the 68040? -- Pavel Kuznetsov SupraFAXModem 28.8 @ 28,800 bps "The hatch is open. Is anyone listening?" From hmoreau@mindspring.com Sun Jun 18 05:57:20 1995 Path: ashpoly!cascade!transat!ukc!fennimore!mindspring!hmoreau From: hmoreau@mindspring.com (Heather Moreau) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun18.055720.1251@mindspring.com> Date: Sun, 18 Jun 1995 05:57:20 GMT References: <1995Jun17.101220.3411@demon.co.uk> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Jun17.101220.3411@demon.co.uk>, pkuznetsov@demon.co.uk (Pavel Kuznetsov) writes: > 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. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Heather Moreau Zyxel U-1496E @ 33,600 bps "Do not worship the copy."