From jramirez@mit.edu Wed Apr 27 15:03:01 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mit!jramirez From: jramirez@mit.edu (Jens Ramírez) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr27.150301.6833@mit.edu> Date: Wed, 27 Apr 1994 15:03:01 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Jens Ramírez *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From msilva@pipeline.com Thu Apr 28 21:11:01 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!pipeline!msilva From: msilva@pipeline.com (Mathieu Silva) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr28.211101.6095@pipeline.com> Date: Thu, 28 Apr 1994 21:11:01 GMT References: <1994Apr27.150301.6833@mit.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr27.150301.6833@mit.edu>, jramirez@mit.edu (Jens Ramírez) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Mathieu Silva -- The Pipeline Internet Network "Marcus is not one man." From tgirard@delphi.com Fri Apr 29 18:56:01 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!tgirard From: tgirard@delphi.com (Takeshi Girard) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr29.185601.4193@delphi.com> Date: Fri, 29 Apr 1994 18:56:01 GMT References: <1994Apr27.150301.6833@mit.edu> <1994Apr28.211101.6095@pipeline.com> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr28.211101.6095@pipeline.com>, msilva@pipeline.com (Mathieu Silva) 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. -- Takeshi Girard | tgirard@delphi.com PGP Key fingerprint: 96AA 67AC CCFD D4BC "Keep the channels open." From bandersson@cmu.edu Sat Apr 30 17:04:01 1994 Path: ashpoly!cascade!bigsur!cmu!bandersson From: bandersson@cmu.edu (Brian Andersson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr30.170401.8464@cmu.edu> Date: Sat, 30 Apr 1994 17:04:01 GMT References: <1994Apr27.150301.6833@mit.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Apr27.150301.6833@mit.edu>, jramirez@mit.edu (Jens Ramírez) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Brian Andersson | bandersson@cmu.edu PGP Key fingerprint: A5C7 33F1 2AE7 E46E "Keep the channels open." From slee@inria.fr Sat Apr 30 22:30:01 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!inria!slee From: slee@inria.fr (Sergei Lee) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr30.223001.9691@inria.fr> Date: Sat, 30 Apr 1994 22:30:01 GMT References: <1994Apr27.150301.6833@mit.edu> <1994Apr30.170401.8464@cmu.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1994Apr30.170401.8464@cmu.edu>, bandersson@cmu.edu (Brian Andersson) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Sergei Lee -- INRIA Rocquencourt "Hold for relay."