From jjohansson@unam.mx Sat Jan 15 06:13:31 1994 Path: ashpoly!cascade!brgate!saturno!unam!jjohansson From: jjohansson@unam.mx (Jen Johansson) Newsgroups: comp.sys.m68k Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Jan15.061331.3938@unam.mx> Date: Sat, 15 Jan 1994 06:13:31 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. 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? -- Jen Johansson *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From ksouza@netcom.com Sat Jan 15 09:39:31 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!netcom!ksouza From: ksouza@netcom.com (Kenji Souza) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Jan15.093931.6722@netcom.com> Date: Sat, 15 Jan 1994 09:39:31 GMT References: <1994Jan15.061331.3938@unam.mx> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Jan15.061331.3938@unam.mx>, jjohansson@unam.mx (Jen Johansson) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Kenji Souza Practical Peripherals 14.4 @ ISDN 64k bps "Extraordinary claims require extraordinary spectra."