From csanchez@cam.ac.uk Thu Feb 23 16:46:32 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cam!csanchez From: csanchez@cam.ac.uk (Camila Sánchez) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb23.164632.4522@cam.ac.uk> Date: Thu, 23 Feb 1995 16:46:32 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. 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? -- Camila Sánchez -- University of Cambridge Computer Laboratory "A soul is not exclusive to biology." From gschneider@inria.fr Fri Feb 24 13:13:32 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!gschneider From: gschneider@inria.fr (Göran Schneider) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb24.131332.3712@inria.fr> Date: Fri, 24 Feb 1995 13:13:32 GMT References: <1995Feb23.164632.4522@cam.ac.uk> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Feb23.164632.4522@cam.ac.uk>, csanchez@cam.ac.uk (Camila Sánchez) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Göran Schneider Practical Peripherals 14.4 @ ISDN 64k bps "When every node is whole, the channel opens." From bsouza@delphi.com Sun Feb 26 01:21:32 1995 Path: ashpoly!cascade!mxgate!coyoacan!delphi!bsouza From: bsouza@delphi.com (Bruno Souza) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb26.012132.1373@delphi.com> Date: Sun, 26 Feb 1995 01:21:32 GMT References: <1995Feb23.164632.4522@cam.ac.uk> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Feb23.164632.4522@cam.ac.uk>, csanchez@cam.ac.uk (Camila Sánchez) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Bruno Souza *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From gandersson@earthlink.net Sun Feb 26 10:24:32 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!gandersson From: gandersson@earthlink.net (Göran Andersson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb26.102432.2067@earthlink.net> Date: Sun, 26 Feb 1995 10:24:32 GMT References: <1995Feb23.164632.4522@cam.ac.uk> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Feb23.164632.4522@cam.ac.uk>, csanchez@cam.ac.uk (Camila Sánchez) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Göran Andersson | gandersson@earthlink.net PGP Key fingerprint: 3B82 517E 5E5B 54A1 "Keep the channels open." From jsanchez@demon.co.uk Mon Feb 27 09:44:32 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!demon!jsanchez From: jsanchez@demon.co.uk (Julien Sánchez) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb27.094432.8039@demon.co.uk> Date: Mon, 27 Feb 1995 09:44:32 GMT References: <1995Feb23.164632.4522@cam.ac.uk> <1995Feb26.012132.1373@delphi.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Feb26.012132.1373@delphi.com>, bsouza@delphi.com (Bruno Souza) 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. -- Julien Sánchez -- Demon Internet Services UK "Extraordinary claims require extraordinary spectra."