Hi there I have done this, although in C# and with no COM overhead, and I get about the same results in the .NET as in your Axis client. That is, first call takes longer than the two proceeding calls.
I don't know the exact reason for this, but I think it has to do with the time it takes to establish a connection to the server. The connection object is cached in the instance of the webservice (client), so that subsequent calls does not have the overhead of establishing the connection. Much like the reason to have a connection pooled for database connectivity. Are you sure, that it is not COM overhead? Regards Henrik ----- Original Message ----- From: "Narasimhamurthy, Lakshmi" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, July 13, 2004 7:48 PM Subject: Calling Webservice from VB.NET COM. Performance issues. Hi I am new to axis and VB.NET. But had to work with both at the same time. I am having performance issues with the .NET client calling the Java Webservice running on axis. Have detailed the problem below. Please help. I wrote a webservice in Java. Lets name this WebService1. Scenario 1: ----------- I have a VB.NET code exposed as COM. Lets call it VBNETCOM. I added a webreference to my Webservice1 from VBNETCOM. So in my .NET code, all I have to do is instantiate the WebService1 object and start calling methods on it. Eg: Dim WebService1 ws as new WebService1 ws.callMethod1() ws.callMethod1() ws.callMethod1() Please note that the same method is being called 3 times. Now my problem is that each of the calls to the methods take about half a second. (500ms) which is unacceptable. Scenario 2: ----------- So I did another test. This time the client calling the "WebService1" is not VB.NET COM but a Java client itself. Eg: Call call = (Call) service.createCall(); ... // other code returnvals= (Object[]) call.invoke( values); // method1 call.removeAllParameters(); ... // other code returnvals= (Object[]) call.invoke( values); // method1 call.removeAllParameters(); ... // other code returnvals= (Object[]) call.invoke( values); // method1 In this case, the first call to method1, takes about 300ms, but subsequent calls take only 50 - 90 ms. Please note that in this case, I am reusing the call object, Which I think is the reason for the performance improvement. -> Which leads to the conclusion, some kind of caching is done. Question: --------- How to improve the performance of the webservice call from VB.NET so that it performance at the same level if not better than the Java client? Is this some change that needs to be done at axis settings? or at VB.NET? Any help is appreciated.
