From sandersson@utexas.edu Mon Mar 06 16:25:23 1995 Path: ashpoly!cascade!transat!ukc!fennimore!utexas!sandersson From: sandersson@utexas.edu (Seo-yeon Andersson) Newsgroups: comp.sys.m68k Subject: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar06.162523.2183@utexas.edu> Date: Mon, 06 Mar 1995 16:25:23 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Anyone running this on a Quadra 840AV with the 68040? -- Seo-yeon Andersson "When every node is whole, the channel opens." Sun 3/60 (SunOS 4.1.1) / NEXTSTEP 3.3 From ctanaka@uu.net Tue Mar 07 18:50:23 1995 Path: ashpoly!cascade!bigsur!uu!ctanaka From: ctanaka@uu.net (Camila Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar07.185023.7184@uu.net> Date: Tue, 07 Mar 1995 18:50:23 GMT References: <1995Mar06.162523.2183@utexas.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Mar06.162523.2183@utexas.edu>, sandersson@utexas.edu (Seo-yeon Andersson) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Camila Tanaka Tape trading list upon request. SASE required for international mail. From rsantos@cam.ac.uk Wed Mar 08 18:47:23 1995 Path: ashpoly!cascade!brgate!saturno!cam!rsantos From: rsantos@cam.ac.uk (Raj Santos) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Mar08.184723.5135@cam.ac.uk> Date: Wed, 08 Mar 1995 18:47:23 GMT References: <1995Mar06.162523.2183@utexas.edu> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Mar06.162523.2183@utexas.edu>, sandersson@utexas.edu (Seo-yeon Andersson) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Raj Santos -- University of Cambridge Computer Laboratory "The carrier frequency does not drift by accident."