Java Webservice client slow compared to dot net client

we have DotNet webservice which is being called by two clients , one a dotnet client and other a javaclient
The problem is java client is taking longer time in processing the results when compared to dotnet client and affecting the performance greatly , i'm using axis in java
Is there any know issue with axis regarding my situation here.
also the same java client when run on linux platform still longer time to process.
please provide me some pointer here

I would test the general performance difference between the 2 platforms on the same machine.
I have the feeling that Java is generally slower on windows than .NET
Microsoft has their secrets after all.

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