On 04 Jun 2007 11:58:18 GMT, Rahul Siddharthan <[EMAIL PROTECTED]> wrote:
I made no claim about "all" binaries, and I claimed the exact opposite of what you say I claimed for my own binaries: I said the 32-bit binaries are 50% slower than the 64-bit binaries. (Eg, running time 25 secs for 64-bit, 38 secs for 32-bit.)
i did some homework for you and conducted the FFT benchmark (double precision only, single precision disabled) of the specific library you mention (GSL) using fftbench http://www.fftw.org/benchfft/ in two different execution environments on Intel Core 2 Duo 1.6G machine 1. pure 64-bit - FreeBSD , CFLAGS="-m64 -march=nocono -O3 -fomit-frame-pointer" 2. 32-bit - DragonFlyBSD, CFLAGS="-march=prescott -O3 -fomit-frame-pointer" And here I am attaching the results for you to study. Let me know where do you see the 50 % performance increase? Although this is not an extensive testing you're most welcome to verify it. Cheers kmb -- Something is wrong up on cloud # 9!
speed-32.pdf
Description: Adobe PDF document
speed-64.pdf
Description: Adobe PDF document
