From htanaka@utexas.edu Tue Jul 02 03:24:04 1996 Path: ashpoly!cascade!transat!ukc!fennimore!utexas!htanaka From: htanaka@utexas.edu (Hana Tanaka) Newsgroups: comp.sys.m68k Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul02.032404.8465@utexas.edu> Date: Tue, 02 Jul 1996 03:24:04 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Hana Tanaka "Hold for relay." Amiga 3000T / NEXTSTEP 3.3 From spark@tum.de Wed Jul 03 18:34:04 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!spark From: spark@tum.de (Sven Park) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul03.183404.2755@tum.de> Date: Wed, 03 Jul 1996 18:34:04 GMT References: <1996Jul02.032404.8465@utexas.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 8 In article <1996Jul02.032404.8465@utexas.edu>, htanaka@utexas.edu (Hana Tanaka) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Sven Park Tape trading list upon request. SASE required for international mail. From jnakamura@tum.de Thu Jul 04 20:08:04 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!jnakamura From: jnakamura@tum.de (Julien Nakamura) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul04.200804.4950@tum.de> Date: Thu, 04 Jul 1996 20:08:04 GMT References: <1996Jul02.032404.8465@utexas.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jul02.032404.8465@utexas.edu>, htanaka@utexas.edu (Hana Tanaka) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Julien Nakamura | jnakamura@tum.de PGP Key fingerprint: F280 1863 F86A 3515 "Keep the channels open." From nsilva@panix.com Sat Jul 06 13:13:04 1996 Path: ashpoly!cascade!bigsur!panix!nsilva From: nsilva@panix.com (Natalia Silva) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul06.131304.2597@panix.com> Date: Sat, 06 Jul 1996 13:13:04 GMT References: <1996Jul02.032404.8465@utexas.edu> <1996Jul04.200804.4950@tum.de> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jul04.200804.4950@tum.de>, jnakamura@tum.de (Julien Nakamura) 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. -- Natalia Silva Practical Peripherals 14.4 @ 14,400 bps "The carrier frequency does not drift by accident." From nmuller@purdue.edu Mon Jul 08 15:39:04 1996 Path: ashpoly!cascade!transat!ukc!fennimore!purdue!nmuller From: nmuller@purdue.edu (Nadia Müller) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul08.153904.3517@purdue.edu> Date: Mon, 08 Jul 1996 15:39:04 GMT References: <1996Jul02.032404.8465@utexas.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Jul02.032404.8465@utexas.edu>, htanaka@utexas.edu (Hana Tanaka) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > 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. -- === Nadia Müller === Dept of Electrical Engineering, Purdue University Engineering Computer Network "Hardware is temporary. The signal survives."