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POIs there something I can do to optimise my linq query?
 

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  1. POIs there something I can do to optimise my linq query?
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    <p>I have to be able to sort out a list of object which might contains doubloon with certain criteria. So far the code is working but it takes 10 minutes for 50,000 rows in my list.</p> <p>Here is the code :</p> <pre><code> public class TestObject { public string value1; public string value2; public string value3; public string value4; public int num1; public int num2; } public static List&lt;TestObject&gt; ReturnTestObjectListWithoutDoubloon(List&lt;TestObject&gt; source) { var destination = new List&lt;TestObject&gt;(); var list = new Dictionary&lt;int, TestObject&gt;(); while (source.Count &gt; 0) { list.Clear(); var originalElement = source[0]; foreach (var query in source.Select((element, index) =&gt; new { Value = element, Index = index }) .Where(currentElement =&gt; (currentElement.Value.value1 == originalElement.value1) &amp;&amp; (currentElement.Value.value2 == originalElement.value2) &amp;&amp; (currentElement.Value.value3 == originalElement.value3) &amp;&amp; (currentElement.Value.value4 == originalElement.value4))) { list.Add(query.Index, query.Value); } if (list.Count &gt; 1) { originalElement.num1 = list.Sum(a =&gt; a.Value.num1); originalElement.num2 = list.Sum(a =&gt; a.Value.num2); } destination.Add(originalElement); foreach (var positionToremove in list.Keys) source.RemoveAt(positionToremove); } return destination; } </code></pre> <p>The idea is to reduce the list each time I pass the while loop so my Linq request is executed on the smallest list possible. However the fewer doubloons I have , the slower it is. I am looking for a solution which allows me to have the smallest rutnime possible, memory is not an issue.</p> <p>Does anyone have an idea ?</p>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USlollancf37
    1. USlollancf37
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    1. This table or related slice is empty.
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    1. PO
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    2. PO
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    1. This table or related slice is empty.
    1. COdoubloon = double elements and you want to do something when you encounter that case?
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      1. POIs there something I can do to optimise my linq query?
      1. USFemaref
    2. COI smell a copypasta error : are you sure about comparing value3 to value4? (currentElement.Value.value3 == originalElement.value4)
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      1. POIs there something I can do to optimise my linq query?
      1. USFlorian Doyon
    3. COA doubloon is a gold coin. I don't see what that has to do with this problem.
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      1. POIs there something I can do to optimise my linq query?
      1. USGabe
 

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