From msmirnov@tum.de Sun Aug 04 22:41:06 1996 Path: ashpoly!cascade!mxgate!coyoacan!tum!msmirnov From: msmirnov@tum.de (Marisol Smirnov) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Aug04.224106.2944@tum.de> Date: Sun, 04 Aug 1996 22:41:06 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? 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. Anyone running this on a Quadra 840AV with the 68040? -- Marisol Smirnov -- Technische Universität München "The carrier frequency does not drift by accident." From mmoreau@tum.de Mon Aug 05 10:41:06 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!tum!mmoreau From: mmoreau@tum.de (Matthias Moreau) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Aug05.104106.1539@tum.de> Date: Mon, 05 Aug 1996 10:41:06 GMT References: <1996Aug04.224106.2944@tum.de> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Aug04.224106.2944@tum.de>, msmirnov@tum.de (Marisol Smirnov) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Matthias Moreau -- Technische Universität München "Marcus is not one man." From lpopov@berkeley.edu Tue Aug 06 09:06:06 1996 Path: ashpoly!cascade!mxgate!coyoacan!berkeley!lpopov From: lpopov@berkeley.edu (Lisa Popov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Aug06.090606.1948@berkeley.edu> Date: Tue, 06 Aug 1996 09:06:06 GMT References: <1996Aug04.224106.2944@tum.de> <1996Aug05.104106.1539@tum.de> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Aug05.104106.1539@tum.de>, mmoreau@tum.de (Matthias Moreau) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Lisa Popov Opinions expressed are solely my own and not those of UC Berkeley Department of EECS. ------------------------------------------------------------ From amoreau@tum.de Thu Aug 08 01:45:06 1996 Path: ashpoly!cascade!brgate!saturno!tum!amoreau From: amoreau@tum.de (Aiko Moreau) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Aug08.014506.9710@tum.de> Date: Thu, 08 Aug 1996 01:45:06 GMT References: <1996Aug04.224106.2944@tum.de> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Aug04.224106.2944@tum.de>, msmirnov@tum.de (Marisol Smirnov) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Aiko Moreau Opinions expressed are solely my own and not those of Technische Universität München. ------------------------------------------------------------ From kito@cam.ac.uk Thu Aug 08 10:27:06 1996 Path: ashpoly!cascade!brgate!saturno!cam!kito From: kito@cam.ac.uk (Katrin Ito) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Aug08.102706.4577@cam.ac.uk> Date: Thu, 08 Aug 1996 10:27:06 GMT References: <1996Aug04.224106.2944@tum.de> <1996Aug05.104106.1539@tum.de> <1996Aug06.090606.1948@berkeley.edu> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1996Aug06.090606.1948@berkeley.edu>, lpopov@berkeley.edu (Lisa Popov) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Katrin Ito -- University of Cambridge Computer Laboratory "There are 14 nodes and only 10 countries. Count again."