LINQ tricks for performance (LINQ2SQL Old School)

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I’m working quite a bit on the new Silicon Valley Code Camp site these days and introducing lots of new ways to view sessions.  Much of this code I’ve written over 8 years ago, long before I had so many tricks in my bag. So, one of the things we track is session interest by attendee.  To do that we have two tables, SessionAttendee and Sessions. Doing a simple join and count of the number of SessionAttendee records per session pretty much gives us what we need. Basically, we create a dictionary so we can get all the counts at once so that way, just one sql to the database interestCountsDict = (from data in meta.SessionAttendee where data.Interestlevel == 2 group data by … Continue Reading

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