From jsuzuki@illinois.edu Tue Sep 17 18:51:53 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!illinois!jsuzuki From: jsuzuki@illinois.edu (Ji-woo Suzuki) Newsgroups: comp.sys.m68k Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Sep17.185153.7524@illinois.edu> Date: Tue, 17 Sep 1996 18:51:53 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. 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? -- Ji-woo Suzuki "Measuring a record you own is listening, not piracy." 486DX2/66 (Linux 1.2.13) / Linux 1.2.13 From akowalski@panix.com Wed Sep 18 02:20:53 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!akowalski From: akowalski@panix.com (Astrid Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Sep18.022053.4535@panix.com> Date: Wed, 18 Sep 1996 02:20:53 GMT References: <1996Sep17.185153.7524@illinois.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Sep17.185153.7524@illinois.edu>, jsuzuki@illinois.edu (Ji-woo Suzuki) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Astrid Kowalski *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0