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Re: [Discuss-gnuradio] ANCI-C vs Gnuradio/C++ speeeed

From: Achilleas Anastasopoulos
Subject: Re: [Discuss-gnuradio] ANCI-C vs Gnuradio/C++ speeeed
Date: Fri, 12 May 2006 11:45:14 -0400
User-agent: Mozilla Thunderbird 1.0.2 (Windows/20050317)


let me be 100% sure of what you are saying:

the comparison you are referring to was between
Phil Karn's native code in ANSI-C
Phil Karn's native code ported in Gnuradio ?


Robert W McGwier wrote:
Yes. I was comparing Phil Karn's native code to it and it runs at least 20 times faster.


Achilleas Anastasopoulos wrote:

I have noticed a huge speed dissadvantage when comparing my
ANSI-C implementation of a Viterbi decoder with my Gnuradio implementation. The core code is pretty much the same, except
that in the Gnuradio implementation I am using STL vectors.

It seems that Gnuradio is about 20 times SLOWER than ANSI-C!!!
I was wondering if this has to do with Gnuradio itself (buffering +
python + other fat), or with the fact that I had to translate all
my ANCI-C code to C++ and use STL.

Does anyone have similar experiences?


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Achilleas Anastasopoulos                        
Associate Professor
EECS Department               Voice : (734)615-4024
UNIVERSITY OF MICHIGAN        Fax   : (734)763-8041
Ann Arbor, MI 48109-2122      E-mail: address@hidden
URL: http://www-personal.engin.umich.edu/~anastas/      

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