Re: implemented features (Re: Decision time....)

["km b" <kmb810@xxxxxxxxx>]

On 04 Jun 2007 11:58:18 GMT, Rahul Siddharthan <rsidd120@gmail.com> 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!

Attachment: speed-32.pdf
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