Question

I need to increase the performance of a ForEach.

//Pseudocode
foreach (item i item in items)
{
//Call service to open DB conn and get data
}

Within this loop make a call to a service that opens a session sqlserver, gets data from the database and closes the session, so for each iteration.
What I can do?.
Thanks.

Answer 1

Well that does sound like a perfectly good use of Parallel.ForEach – so have you tried it?

Parallel.ForEach(queries, query => {
    // Perform query
});

You may well want to specify options around the level of parallelism etc – and make sure your connection pool supports as many connections as you want. And of course, measure the performance before and after to make sure it’s actually helping.