From thughes@unam.mx Mon Feb 06 08:33:24 1995 Path: ashpoly!cascade!mxgate!coyoacan!unam!thughes From: thughes@unam.mx (Thiago Hughes) Newsgroups: comp.sys.m68k Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb06.083324.5254@unam.mx> Date: Mon, 06 Feb 1995 08:33:24 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. 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? -- Thiago Hughes -- Universidad Nacional Autónoma de México (DGSCA) "In theory there is no difference between theory and practice." From ehernandez@uni-hamburg.de Mon Feb 06 23:32:24 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!uni-hamburg!ehernandez From: ehernandez@uni-hamburg.de (Emi Hernández) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb06.233224.2099@uni-hamburg.de> Date: Mon, 06 Feb 1995 23:32:24 GMT References: <1995Feb06.083324.5254@unam.mx> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Feb06.083324.5254@unam.mx>, thughes@unam.mx (Thiago Hughes) 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. -- Emi Hernández "Marcus is not one man." Mac IIci / 68882 FPU / System 7.5.1