From ksilva@stanford.edu Tue Sep 26 20:37:18 1995 Path: ashpoly!cascade!brgate!saturno!stanford!ksilva From: ksilva@stanford.edu (Karen Silva) Newsgroups: comp.sys.m68k Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep26.203718.9591@stanford.edu> Date: Tue, 26 Sep 1995 20:37:18 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Anyone running this on a Quadra 840AV with the 68040? -- Karen Silva | ksilva@stanford.edu PGP Key fingerprint: 6A1C 30AD 5DDA 11F3 "Keep the channels open." From fsmirnov@purdue.edu Thu Sep 28 01:35:18 1995 Path: ashpoly!cascade!bigsur!purdue!fsmirnov From: fsmirnov@purdue.edu (Fiona Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep28.013518.1327@purdue.edu> Date: Thu, 28 Sep 1995 01:35:18 GMT References: <1995Sep26.203718.9591@stanford.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Sep26.203718.9591@stanford.edu>, ksilva@stanford.edu (Karen Silva) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Fiona Smirnov | fsmirnov@purdue.edu PGP Key fingerprint: 862D 7D04 B8A1 1E03 "Keep the channels open." From jito@cam.ac.uk Sat Sep 30 00:50:18 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cam!jito From: jito@cam.ac.uk (Jen Ito) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep30.005018.5542@cam.ac.uk> Date: Sat, 30 Sep 1995 00:50:18 GMT References: <1995Sep26.203718.9591@stanford.edu> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Sep26.203718.9591@stanford.edu>, ksilva@stanford.edu (Karen Silva) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Jen Ito -- University of Cambridge Computer Laboratory "The carrier frequency does not drift by accident." From ggarcia@tum.de Sat Sep 30 02:49:18 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!ggarcia From: ggarcia@tum.de (Graham García) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep30.024918.7000@tum.de> Date: Sat, 30 Sep 1995 02:49:18 GMT References: <1995Sep26.203718.9591@stanford.edu> <1995Sep30.005018.5542@cam.ac.uk> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Sep30.005018.5542@cam.ac.uk>, jito@cam.ac.uk (Jen Ito) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Graham García Zyxel U-1496E @ 33,600 bps "The carrier frequency does not drift by accident." From tgonzalez@stanford.edu Sat Sep 30 18:54:18 1995 Path: ashpoly!cascade!brgate!saturno!stanford!tgonzalez From: tgonzalez@stanford.edu (Tomas González) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Sep30.185418.3921@stanford.edu> Date: Sat, 30 Sep 1995 18:54:18 GMT References: <1995Sep26.203718.9591@stanford.edu> <1995Sep30.005018.5542@cam.ac.uk> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Sep30.005018.5542@cam.ac.uk>, jito@cam.ac.uk (Jen Ito) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Tomas González -- Stanford University Computer Systems Lab "In theory there is no difference between theory and practice."