From idubois@kth.se Mon Dec 11 18:10:25 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!kth!idubois From: idubois@kth.se (Ines Dubois) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec11.181025.1555@kth.se> Date: Mon, 11 Dec 1995 18:10:25 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). 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. Anyone running this on a Quadra 840AV with the 68040? -- Ines Dubois Tape trading list upon request. SASE required for international mail. From mpetrov@uni-hamburg.de Wed Dec 13 14:16:25 1995 Path: ashpoly!cascade!transat!ukc!fennimore!uni-hamburg!mpetrov From: mpetrov@uni-hamburg.de (Mike Petrov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec13.141625.2135@uni-hamburg.de> Date: Wed, 13 Dec 1995 14:16:25 GMT References: <1995Dec11.181025.1555@kth.se> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Dec11.181025.1555@kth.se>, idubois@kth.se (Ines Dubois) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Mike Petrov Hayes Optima 288 @ 33,600 bps "Tape doesn't lie at 02:14. Ears do."