 Posted Friday, April 27, 2007 8:03 AM
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| Hi, I recently downloaded the trial version for testing in my vb.net app. My need is basically to avoid/minimise the for loops associated whenever dealing with arrays and matrices. The matrix library is simple to use but is there a loss of speed in using the library over the direct for loops ? Nilimb
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Posted Friday, April 27, 2007 8:21 AM
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| On the contrary you will get a performance improvement 100-500% compared to normal managed code. The Bluebit .NET Matrix Library uses internally highly optimized native C++ libraries, and combines together managed and unmanaged code and delivers the best of both worlds; the speed of native C++ code and the feature-rich and easy to use environment of the .NET Framework. Please find here some performance benchmarks : http://www.bluebit.gr/benchmarks.htm Please contact us again if there is anything more we can help.
Trifon Triantafillidis | Lead Developer | 
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Posted Friday, April 27, 2007 8:52 AM
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| could you please point to documentation of vector examples . Is there an example i can use to compare the speed ?
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Posted Friday, April 27, 2007 12:51 PM
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I am afraid we do not have any tests for vectors online. I you wish you may specify the vector sizes and operations you need timings for and I can run some tests and post the results here.
Trifon Triantafillidis | Lead Developer | |
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Posted Monday, April 30, 2007 6:41 AM
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| Sure That will be really helpful. Can you suggest the time for finding squareroot of [x(3000,1).^2 + y(3000,1).^2] compared to a straightforward code.
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Posted Monday, April 30, 2007 8:43 AM
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I have used the following code: int n = 3000;
Vector A = new Vector(n);
Vector B = new Vector(n);
Vector C ;
double d; A.FillRandom();
B.FillRandom(); DateTime start = DateTime.Now; C = Vector.Multiply(A, A) + Vector.Multiply(B, B);
d = Math.Sqrt( C.Sum() ); TimeSpan span = DateTime.Now.Subtract(start);
Console.WriteLine("result ={0}, time={1}", d, span.Ticks/ TimeSpan.TicksPerMillisecond );
Console.Read(); The results for various values of n are:
n milliseconds
3000 0
10000 0
100000 1
1000000 31
10000000 390
My machine is a Pentium 4 at 3.2GHz
Trifon Triantafillidis | Lead Developer | |
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