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POObject copy approaches in .net: Auto Mapper, Emit Mapper, Implicit Operation, Property Copy
 

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    <p>If some one knows any more ways of doing this in .NET and also what is your opinions about that approaches? Which approach you choose and why?</p> <p>Here is the tests of different ways of object copy in .NET. </p> <p>Tests Related to this original thread: <a href="https://stackoverflow.com/questions/531505/how-to-copy-value-from-class-x-to-class-y-with-the-same-property-name-in-c">How to copy value from class X to class Y with the same property name in c#?</a></p> <p>So, here it is, you can run it yourself:</p> <pre><code>static void Main(string[] args) { Student _student = new Student(); _student.Id = 1; _student.Name = "Timmmmmmmmaaaahhhh"; _student.Courses = new List&lt;int&gt;(); _student.Courses.Add(101); _student.Courses.Add(121); Stopwatch sw = new Stopwatch(); Mapper.CreateMap&lt;Student, StudentDTO&gt;(); StartTest(sw, "Auto Mapper"); for (int i = 0; i &lt; 1000000; i++) { StudentDTO dto = Mapper.Map&lt;Student, StudentDTO&gt;(_student); } StopTest(sw); StartTest(sw, "Implicit Operator"); for (int i = 0; i &lt; 1000000; i++) { StudentDTO itemT = _student; } StopTest(sw); StartTest(sw, "Property Copy"); for (int i = 0; i &lt; 1000000; i++) { StudentDTO itemT = new StudentDTO { Id = _student.Id, Name = _student.Name, }; itemT.Courses = new List&lt;int&gt;(); foreach (var course in _student.Courses) { itemT.Courses.Add(course); } } StopTest(sw); StartTest(sw, "Emit Mapper"); ObjectsMapper&lt;Student, StudentDTO&gt; emitMapper = ObjectMapperManager.DefaultInstance.GetMapper&lt;Student, StudentDTO&gt;(); for (int i = 0; i &lt; 1000000; i++) { StudentDTO itemT = emitMapper.Map(_student); } StopTest(sw); } </code></pre> <p>Tests results on my PC:</p> <p>Test Auto Mapper:22322 ms</p> <p>Test Implicit Operator:310 ms</p> <p>Test Property Copy:250 ms</p> <p>Test Emit Mapper:281 ms</p> <p>You can get emit and auto -mappers from here:</p> <p><a href="http://emitmapper.codeplex.com/" rel="nofollow noreferrer">http://emitmapper.codeplex.com/</a></p> <p><a href="http://automapper.codeplex.com/" rel="nofollow noreferrer">http://automapper.codeplex.com/</a></p>
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    1. COThat's great, but what is your question?
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    2. COYeah, I don't see the point of all this. You need a goal before you can even decide that you need a copy (instead of using the original object), and you need a goal in order to choose the right approach. That said, another copier is MemberwiseClone().
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    3. COAre you trying to create a copy of object for testing..I don't understand question...u can use mole in .net4...Mapper would work best..But please clarify your question
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      1. USWingMan20-10
 

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