Report Rendering Very Slow With RDLC

I am running into some horrible performance with running reports as .rdlc's
The reports themselves are fairly straightforward, save for some column and row groupings in matrices. If I have one simple column group, things run pretty quickly. If I add one or two more groupings, things slow down incredibly!
I've been doing some research and have found that several people have experienced the same problem as I.
http://prologika.com/CS/forums/p/1272/4541.aspx#4541
Unfortunately, I don't have the option to test out performance of the reports against a "real" SSRS installation. And the data source I'm working with is actually a C# dataset versus an actual SQL Server database.
We're currently running on Windows Server 2003 and are using .Net 4.0
Has anyone else experienced the same issue, and if so, how did you ultimately resolve/work around the issue? Amazing that the performance between rdlc and rdl's could be that drastic!
The developers have mentioned creating a field for each possible value for a field. For example, there is a top level group called "Plan" and a sub-group called "Unit". These are just two of the fields we are grouping on for column groups.
There are possibly 30 different plans, with possibly up to 6 units. So essentially, there would be up to 180 columns in a table. We would then need to write expressions to hide any columns/groups that have no value. Not a smart option...
A. M. Robinson

Hi Robinson,
Thank you for your question.
I am trying to involve someone more familiar with this topic for a further look at this issue. Sometime delay might be expected from the job transferring. Your patience is greatly appreciated.
Thank you for your understanding and support.
Regards,
Charlie Liao
If you have any feedback on our support, please click
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Charlie Liao
TechNet Community Support

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SSRS Subreport - Renders very slow

Hi All,
I have a subreport which is embedded in the main report (form report) which is inturn embedded in a list. The report is executed for different levels with each level having different number of records (say 100, 150, etc.) and gives us a form for each
of the records on a single page. That is the report will have 150 pages for 150 records. My subreport renders very fast when it is run stand alone. Even the SPs written for the subreport are giving results within seconds. But when embedded in the main
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Have been struggling with this issue for a while. Request you to help me in this regard.
Regards,
Bala.

Hi Bala,
According to your description, it seems that the issue is caused by the parameters. Please check the parameters setting of each subreport control in the main report. Make sure the data types are the same between the parameters, and the values passed to the
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As to the report performance, we can refer to the ExecutionLog View to monitor it. The total time to generate a reporting server report (RDL) can be divided into 3 elements:
Total time = (TimeDataRetrieval) + (TimeProcessing) + (TimeRendering)
For more details about troubleshooting report performance, please refer to the following documents:
http://technet.microsoft.com/en-us/library/bb522806(v=sql.105).aspx
http://blogs.msdn.com/b/robertbruckner/archive/2009/01/05/executionlog2-view.aspx
Hope this helps.
Thanks,
Katherine Xiong
Katherine Xiong
TechNet Community Support

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Report Rendering Very Slow With RDLC

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