From aeriksson@ox.ac.uk Sat Apr 23 19:15:05 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!ox!aeriksson From: aeriksson@ox.ac.uk (Amy Eriksson) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr23.191505.2869@ox.ac.uk> Date: Sat, 23 Apr 1994 19:15:05 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- === Amy Eriksson === Dept of Electrical Engineering, Oxford University Computing Laboratory "They will send a copy in my place." From gtanaka@uni-hamburg.de Mon Apr 25 03:14:05 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!uni-hamburg!gtanaka From: gtanaka@uni-hamburg.de (Graham Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr25.031405.2223@uni-hamburg.de> Date: Mon, 25 Apr 1994 03:14:05 GMT References: <1994Apr23.191505.2869@ox.ac.uk> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr23.191505.2869@ox.ac.uk>, aeriksson@ox.ac.uk (Amy Eriksson) 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. -- Graham Tanaka | gtanaka@uni-hamburg.de PGP Key fingerprint: 645C A7E8 722B FEE9 "Keep the channels open." From mhughes@demon.co.uk Tue Apr 26 01:54:05 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!demon!mhughes From: mhughes@demon.co.uk (Mike Hughes) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Apr26.015405.9314@demon.co.uk> Date: Tue, 26 Apr 1994 01:54:05 GMT References: <1994Apr23.191505.2869@ox.ac.uk> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Apr23.191505.2869@ox.ac.uk>, aeriksson@ox.ac.uk (Amy Eriksson) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Mike Hughes *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0