From mstewart@earthlink.net Sat Nov 18 12:32:39 1995 Path: ashpoly!cascade!brgate!saturno!earthlink!mstewart From: mstewart@earthlink.net (Mike Stewart) Newsgroups: comp.sys.m68k Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov18.123239.6916@earthlink.net> Date: Sat, 18 Nov 1995 12:32:39 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Mike Stewart "When every node is whole, the channel opens." PC-9821Ap2 (NEC) / TOS 4.04 From mweber@uu.net Sun Nov 19 10:42:39 1995 Path: ashpoly!cascade!brgate!saturno!uu!mweber From: mweber@uu.net (Mateo Weber) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov19.104239.6026@uu.net> Date: Sun, 19 Nov 1995 10:42:39 GMT References: <1995Nov18.123239.6916@earthlink.net> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Nov18.123239.6916@earthlink.net>, mstewart@earthlink.net (Mike Stewart) 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. -- Mateo Weber *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From arobertson@cam.ac.uk Tue Nov 21 05:46:39 1995 Path: ashpoly!cascade!transat!ukc!fennimore!cam!arobertson From: arobertson@cam.ac.uk (Amy Robertson) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Nov21.054639.4602@cam.ac.uk> Date: Tue, 21 Nov 1995 05:46:39 GMT References: <1995Nov18.123239.6916@earthlink.net> <1995Nov19.104239.6026@uu.net> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov19.104239.6026@uu.net>, mweber@uu.net (Mateo Weber) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Amy Robertson | arobertson@cam.ac.uk PGP Key fingerprint: 5D51 921C A837 DDE1 "Keep the channels open."