RDLC performance in a ReportView local mode.

Hi,

I have a reportviewer in an aspx page.  It is in local mode and uses a report which is populated by a list of Customer objects.

The performance is good when I only add fields ID and FullName to the RDLC XML.

However as soon as I start adding new fields, like email, phone or address fields, the performance drops off exponentially and the control becomes unusable.  This is just when I add to the <Fields>, not even adding anything to display in the Tablix fields.

It feels like there is something going on with each new field added, like some kind of indexing or grouping that needs to be disabled.

Any advice?

(e.g. removing one of the three fields from below in the RDLC XML vastly improves performance:

   <Field Name="ID">
          <DataField>ID</DataField>
          <rd:TypeName>System.Int32</rd:TypeName>
        </Field>
        <Field Name="FullName">
          <DataField>FullNameRDLC</DataField>
          <rd:TypeName>System.String</rd:TypeName>
        </Field>
      <Field Name="PrimaryAddress">
          <DataField>PrimaryAddress</DataField>
          <rd:TypeName>System.String</rd:TypeName>
        </Field>

)

Thanks, 

   Jack.