Class Method Is Smoking Fast When Executed Outside Of SQLServer, Dog Slow As A CLR Function Is SQLServer - Anyone?

We have a static class that makes an HTTPWebRequest to get XML data from one of our vendors. We use this as input to a stored proc in SQLServer2005. When I compile this class and call it from a console application in visual studio it executes in milliseconds, everytime. When I compile it, create the assembly and clr function and execute it in SQLServer, it takes around 14 seconds to execute the first time, then on subsequent requests it is again really fast, until I wait for 10 seconds and re-execute, once again it is slow the first time and then fast on subsequent requests. We do not see this behavior when executing outside SQLServer. Makes me think that some sort of authentication is perhaps taking place the first time the function is run in SQLServer? I have no idea how to debug this further. Anyone seen this before or have any ideas?



Here is the class:






Code Snippet

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;

namespace Predict.Services
{
public static class Foo
{
public static string GetIntradayQuote(string symbol)
{
string returnQuote = "";

HttpWebRequest request = (HttpWebRequest)(WebRequest.Create("http://data.predict.com/predictws/detailed_quote.html?syms=" + symbol + "&fields=1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,28,30"));

request.Timeout = 1000;

HttpWebResponse response = (HttpWebResponse)(request.GetResponse());

StreamReader streamReader = new StreamReader(response.GetResponseStream());

returnQuote = streamReader.ReadToEnd();

streamReader.Close();
response.Close();

return returnQuote;
}
}
}



When I run call it from a console app it is fine.



I compile it into a dll and then create the assembly and function as follows:






Code Snippet

drop function fnTestGetIntradayQuoteXML_SJS

go

drop assembly TestGetIntradayQuoteXML_SJS

go

create ASSEMBLY TestGetIntradayQuoteXML_SJS from 'c:DataBackupsCLRLibrariesTestGetIntradayQuote_SJS.dll' WITH PERMISSION_SET = EXTERNAL_ACCESS

go

CREATE FUNCTION fnTestGetIntradayQuoteXML_SJS(@SymbolList nvarchar(max)) RETURNS nvarchar(max) AS EXTERNAL NAME TestGetIntradayQuoteXML_SJS.[Predict.Services.Foo].GetIntraDayQuote

go



declare @testing nvarchar(max)

set @testing = dbo.fnTestGetIntradayQuoteXML_SJS('goog')

print @testing





When I execute the function as above, again, really slow the first time, then fast on subsequent calls. Could there be something wrong with the code, or some headers that need to be set differently to operate from the CLR in SQLServer?



Regards,



Skipper.