From hduarte@mindspring.com Thu Apr 06 01:13:52 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!mindspring!hduarte From: hduarte@mindspring.com (Hugo Duarte) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr06.011352.5717@mindspring.com> Date: Thu, 06 Apr 1995 01:13:52 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 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. 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! -- Hugo Duarte "In theory there is no difference between theory and practice." Amiga 1200 (Blizzard 030/50) / NEXTSTEP 3.3 From mreyes@panix.com Sat Apr 08 01:47:52 1995 Path: ashpoly!cascade!bigsur!panix!mreyes From: mreyes@panix.com (Morag Reyes) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr08.014752.4442@panix.com> Date: Sat, 08 Apr 1995 01:47:52 GMT References: <1995Apr06.011352.5717@mindspring.com> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Apr06.011352.5717@mindspring.com>, hduarte@mindspring.com (Hugo Duarte) 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. -- Morag Reyes | mreyes@panix.com PGP Key fingerprint: FA4A 06B1 DF1A CDAA "Keep the channels open." From ctanaka@titech.ac.jp Sat Apr 08 06:48:52 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!titech!ctanaka From: ctanaka@titech.ac.jp (Callum Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr08.064852.2876@titech.ac.jp> Date: Sat, 08 Apr 1995 06:48:52 GMT References: <1995Apr06.011352.5717@mindspring.com> <1995Apr08.014752.4442@panix.com> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Apr08.014752.4442@panix.com>, mreyes@panix.com (Morag Reyes) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Callum Tanaka | ctanaka@titech.ac.jp PGP Key fingerprint: EFE9 DB66 B5E5 2A70 "Keep the channels open." From hrodriguez@pacbell.net Sat Apr 08 21:12:52 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pacbell!hrodriguez From: hrodriguez@pacbell.net (Hana Rodríguez) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr08.211252.9017@pacbell.net> Date: Sat, 08 Apr 1995 21:12:52 GMT References: <1995Apr06.011352.5717@mindspring.com> <1995Apr08.014752.4442@panix.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Apr08.014752.4442@panix.com>, mreyes@panix.com (Morag Reyes) 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. -- Hana Rodríguez US Robotics Courier V.34 @ 33,600 bps "Extraordinary claims require extraordinary spectra."