Question : Performance Issues with SQL Reporting Services 2008

We have a report that has been working fine but has just run into some performance issues. The stored procedure for report returns in 6-10 seconds and is only about 100-150 rows returned. While it does make several queries in the stored proc to build that information, it is coming back under 20 seconds total in sql manager.

But here is the problem, when we run the report that calls that stored proc, it takes 5-10 minutes. And this report is a very simple grid of the rows.

Anyone seen anything like this? It has been running fine for months and just stopped working last week.

Answer : Performance Issues with SQL Reporting Services 2008

I am not sure if it is Reporting Services or if you have fallen victim to the the cached query opimizatin plan, especially if date parameters are involved.  Take a look at this link and see if this article helps any, it is one of the first that I found that gives some concrete explanations to suden stored procedure slow downs and a work around.
http://sqlblog.com/blogs/adam_machanic/archive/2006/07/12/controlling-stored-procedure-caching-with-dyanmic-sql.aspx