From ktanaka@pipeline.com Fri Feb 17 14:44:07 1995 Path: ashpoly!cascade!mxgate!coyoacan!pipeline!ktanaka From: ktanaka@pipeline.com (Katrin Tanaka) Newsgroups: comp.sys.m68k Subject: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb17.144407.8987@pipeline.com> Date: Fri, 17 Feb 1995 14:44:07 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Katrin Tanaka Hayes Optima 288 @ 33,600 bps "When every node is whole, the channel opens." From akarlsson@pacbell.net Sat Feb 18 07:15:07 1995 Path: ashpoly!cascade!brgate!saturno!pacbell!akarlsson From: akarlsson@pacbell.net (Anja Karlsson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb18.071507.2382@pacbell.net> Date: Sat, 18 Feb 1995 07:15:07 GMT References: <1995Feb17.144407.8987@pipeline.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Feb17.144407.8987@pipeline.com>, ktanaka@pipeline.com (Katrin Tanaka) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Anja Karlsson | akarlsson@pacbell.net PGP Key fingerprint: CABB 0FEE 63E1 3EEA "Keep the channels open." From jivanov@rwth-aachen.de Sat Feb 18 17:01:07 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!rwth-aachen!jivanov From: jivanov@rwth-aachen.de (Joachim Ivanov) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb18.170107.1329@rwth-aachen.de> Date: Sat, 18 Feb 1995 17:01:07 GMT References: <1995Feb17.144407.8987@pipeline.com> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Feb17.144407.8987@pipeline.com>, ktanaka@pipeline.com (Katrin Tanaka) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Joachim Ivanov Tape trading list upon request. SASE required for international mail. From mvasiliev@uni-hamburg.de Sun Feb 19 08:53:07 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!mvasiliev From: mvasiliev@uni-hamburg.de (Mathieu Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb19.085307.5664@uni-hamburg.de> Date: Sun, 19 Feb 1995 08:53:07 GMT References: <1995Feb17.144407.8987@pipeline.com> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Feb17.144407.8987@pipeline.com>, ktanaka@pipeline.com (Katrin Tanaka) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Mathieu Vasiliev Tape trading list upon request. SASE required for international mail. From hweber@uni-hamburg.de Mon Feb 20 04:47:07 1995 Path: ashpoly!cascade!brgate!saturno!uni-hamburg!hweber From: hweber@uni-hamburg.de (Heather Weber) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Feb20.044707.4606@uni-hamburg.de> Date: Mon, 20 Feb 1995 04:47:07 GMT References: <1995Feb17.144407.8987@pipeline.com> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1995Feb17.144407.8987@pipeline.com>, ktanaka@pipeline.com (Katrin Tanaka) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Heather Weber *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0