From ssantos@mit.edu Sat Mar 05 07:32:11 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mit!ssantos From: ssantos@mit.edu (Steve Santos) Newsgroups: comp.sys.m68k Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar05.073211.6782@mit.edu> Date: Sat, 05 Mar 1994 07:32:11 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu 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. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Steve Santos | ssantos@mit.edu PGP Key fingerprint: CA16 3342 4667 6F9C "Keep the channels open." From epopov@kiae.su Mon Mar 07 03:23:11 1994 Path: ashpoly!cascade!bigsur!kiae!epopov From: epopov@kiae.su (Élodie Popov) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar07.032311.6758@kiae.su> Date: Mon, 07 Mar 1994 03:23:11 GMT References: <1994Mar05.073211.6782@mit.edu> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Mar05.073211.6782@mit.edu>, ssantos@mit.edu (Steve Santos) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Élodie Popov *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From amartinez@cmu.edu Tue Mar 08 12:20:11 1994 Path: ashpoly!cascade!brgate!saturno!cmu!amartinez From: amartinez@cmu.edu (Amy Martínez) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar08.122011.1356@cmu.edu> Date: Tue, 08 Mar 1994 12:20:11 GMT References: <1994Mar05.073211.6782@mit.edu> <1994Mar07.032311.6758@kiae.su> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Mar07.032311.6758@kiae.su>, epopov@kiae.su (Élodie Popov) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Amy Martínez "Hold for relay." 486DX2/66 (Linux 1.2.13) / SunOS 4.1.4 From bduarte@cmu.edu Wed Mar 09 23:30:11 1994 Path: ashpoly!cascade!brgate!saturno!cmu!bduarte From: bduarte@cmu.edu (Bastien Duarte) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Mar09.233011.1390@cmu.edu> Date: Wed, 09 Mar 1994 23:30:11 GMT References: <1994Mar05.073211.6782@mit.edu> <1994Mar07.032311.6758@kiae.su> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1994Mar07.032311.6758@kiae.su>, epopov@kiae.su (Élodie Popov) 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. -- Bastien Duarte Tape trading list upon request. SASE required for international mail.