From rgarcia@delphi.com Mon Nov 14 15:33:34 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!delphi!rgarcia From: rgarcia@delphi.com (Rodrigo García) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Nov14.153334.5326@delphi.com> Date: Mon, 14 Nov 1994 15:33:34 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 10 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? 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. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Rodrigo García -- Delphi Internet Services "When every node is whole, the channel opens." From sandersson@mindspring.com Mon Nov 14 21:44:34 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!mindspring!sandersson From: sandersson@mindspring.com (Seo-yeon Andersson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Nov14.214434.1789@mindspring.com> Date: Mon, 14 Nov 1994 21:44:34 GMT References: <1994Nov14.153334.5326@delphi.com> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Nov14.153334.5326@delphi.com>, rgarcia@delphi.com (Rodrigo García) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Seo-yeon Andersson Practical Peripherals 14.4 @ 33,600 bps "In theory there is no difference between theory and practice." From hsokolov@cam.ac.uk Wed Nov 16 08:40:34 1994 Path: ashpoly!cascade!brgate!saturno!cam!hsokolov From: hsokolov@cam.ac.uk (Hana Sokolov) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Nov16.084034.5880@cam.ac.uk> Date: Wed, 16 Nov 1994 08:40:34 GMT References: <1994Nov14.153334.5326@delphi.com> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Nov14.153334.5326@delphi.com>, rgarcia@delphi.com (Rodrigo García) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Hana Sokolov Opinions expressed are solely my own and not those of University of Cambridge Computer Laboratory. ------------------------------------------------------------