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Friday, July 06, 2007 11:42 AM

LINQ to SQL Beta2 Performance Numbers and the Dynamic Compilation Pattern

Jomo Fisher--Rico Mariani has been posting about LINQ to SQL perfomance and has finally posted the performance numbers for Beta2: http://blogs.msdn.com/ricom/archive/2007/07/05/dlinq-linq-to-sql-performance-part-4.aspx One of the tricks Rico and Matt
Posted by Jomo Fisher | 1 Comments
Wednesday, May 23, 2007 4:37 PM

Dealing with Linq’s Immutable Expression Trees

Jomo Fisher --I recently got a question via my blog that dovetailed nicely with something I’ve been working on: I know that expression trees are (or at least appear to be) immutable - which requires that you rewrite the entire tree if you want a tree
Posted by Jomo Fisher | 8 Comments
Attachment(s): ExprOpSample-Beta1.cs
Monday, May 07, 2007 3:53 PM

Visitor Revisitted: LINQ, Function Composablity and Chain of Responsibility

Jomo Fisher— Last time , I wrote about constructing an inline visitor using new C# language features. It worked fine for what it did, but it completely falls down when you want to extend existing visitors that you’ve created. What if I wanted to modify
Posted by Jomo Fisher | 8 Comments
Friday, May 04, 2007 5:03 PM

Inline Visitor Construction using LINQ

Jomo Fisher—My current job is in the C# team working on LINQ to SQL. Because of nature of programming languages, very few days go by that I don’t deal with syntax trees and the visitor pattern. Occasionally, it would be convenient to create a quick one-off
Posted by Jomo Fisher | 4 Comments
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Wednesday, March 28, 2007 3:37 PM

Fast Switching with LINQ

Jomo Fisher—I’ve run into a performance problem several times in my career that I’ve never found a truly satisfying answer for until now. The problem can be distilled down to this: Look up a value based on a string key. The set of strings is fixed and
Posted by Jomo Fisher | 33 Comments
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Attachment(s): SwitchCompiler.cs
Friday, October 07, 2005 4:18 PM

C# 3.0 Expression Trees

IanG gives a brilliant explanation of C# 3.0 expression trees and how they enable efficient queries in DLinq: http://www.interact-sw.co.uk/iangblog/2005/09/30/expressiontrees This posting is provided "AS IS" with no warranties, and confers no rights.
Posted by Jomo Fisher | 1 Comments
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Thursday, September 15, 2005 2:57 PM

Creating Custom Aggregate Functions in LINQ

Jomo Fisher —Adriane asks whether it’s possible to create your own aggregate function like Sum, Avg, Count, etc. For object queries, the answer is yes. First, let’s look at the actual implementation of Sum: public static int Sum( this IEnumerable <
Posted by Jomo Fisher | 4 Comments
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Tuesday, September 13, 2005 1:46 PM

Evolution of a C# Query—Step by step from C# 1.1 to LINQ

Jomo Fisher —The future of C# was recently unveiled at PDC. Object, XML and relational data will be integrated deeply into the language. This isn’t really a new direction for C#, it’s the next step down a path that C# has always been headed. To see this,
Posted by Jomo Fisher | 8 Comments
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