From hkim@pipeline.com Mon Jun 12 12:13:52 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!pipeline!hkim From: hkim@pipeline.com (Heather Kim) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun12.121352.8820@pipeline.com> Date: Mon, 12 Jun 1995 12:13:52 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com 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. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Heather Kim | hkim@pipeline.com PGP Key fingerprint: 36F6 CAED 2772 CB1E "Keep the channels open." From lperez@kth.se Wed Jun 14 03:27:52 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!lperez From: lperez@kth.se (Lisa Pérez) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun14.032752.3275@kth.se> Date: Wed, 14 Jun 1995 03:27:52 GMT References: <1995Jun12.121352.8820@pipeline.com> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Jun12.121352.8820@pipeline.com>, hkim@pipeline.com (Heather Kim) 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. -- Lisa Pérez Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm. ------------------------------------------------------------ From mhernandez@uni-hamburg.de Wed Jun 14 14:08:52 1995 Path: ashpoly!cascade!transat!ukc!fennimore!uni-hamburg!mhernandez From: mhernandez@uni-hamburg.de (Mikhail Hernández) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun14.140852.5725@uni-hamburg.de> Date: Wed, 14 Jun 1995 14:08:52 GMT References: <1995Jun12.121352.8820@pipeline.com> <1995Jun14.032752.3275@kth.se> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jun14.032752.3275@kth.se>, lperez@kth.se (Lisa Pérez) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Mikhail Hernández *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From aokonkwo@inria.fr Thu Jun 15 01:28:52 1995 Path: ashpoly!cascade!mxgate!coyoacan!inria!aokonkwo From: aokonkwo@inria.fr (Anton Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun15.012852.8320@inria.fr> Date: Thu, 15 Jun 1995 01:28:52 GMT References: <1995Jun12.121352.8820@pipeline.com> <1995Jun14.032752.3275@kth.se> <1995Jun14.140852.5725@uni-hamburg.de> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jun14.140852.5725@uni-hamburg.de>, mhernandez@uni-hamburg.de (Mikhail Hernández) 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. -- Anton Okonkwo | aokonkwo@inria.fr PGP Key fingerprint: 6341 66A3 F869 7002 "Keep the channels open."