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PODo generic interfaces in C# prevent boxing? (.NET vs Mono performance)
 

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    <p>I have a C# interface with certain method parameters declared as <code>object</code> types. However, the actual type passed around can differ depending on the class implementing the interface:</p> <pre><code>public interface IMyInterface { void MyMethod(object arg); } public class MyClass1 : IMyInterface { public void MyMethod(object arg) { MyObject obj = (MyObject) arg; // do something with obj... } } public class MyClass2 : IMyInterface { public void MyMethod(object arg) { byte[] obj = (byte[]) arg; // do something with obj... } } </code></pre> <p>The problem with MyClass2 is that the conversion of <code>byte[]</code> to and from <code>object</code> is <a href="http://msdn.microsoft.com/en-us/library/yz2be5wk.aspx" rel="nofollow noreferrer">boxing and unboxing</a>, which are computationally expensive operations affecting performance.</p> <p>Would solving this problem with a <a href="http://msdn.microsoft.com/en-us/library/kwtft8ak.aspx" rel="nofollow noreferrer">generic interface</a> avoid boxing/unboxing?</p> <pre><code>public interface IMyInterface&lt;T&gt; { void MyMethod(T arg); } public class MyClass1 : IMyInterface&lt;MyObject&gt; { public void MyMethod(MyObject arg) { // typecast no longer necessary //MyObject obj = (MyObject) arg; // do something with arg... } } public class MyClass2 : IMyInterface&lt;byte[]&gt; { public void MyMethod(byte[] arg) { // typecast no longer necessary //byte[] obj = (byte[]) arg; // do something with arg... } } </code></pre> <p>How is this implemented in .NET vs Mono? Will there be any performance implications on either platform?</p> <p>Thank you!</p>
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