I have the same report defined in both a report class and a trdx file. The report is very simple, it prints a name and address on a single line. There is only a detail band and the report doesn't do any data manipulation, calculations, method calls etc... I ran the following tests with 50,000 records in a WinForm application.
Test 1: Report Class
It takes ~10 minutes to render and preview the report. I'm using an InstanceReportSource created from my report class. I have tried this using both a DataTable and a Telerik.Reporting.SqlDataSource as the DataSource with the same results.
Test 2: TRDX File
It takes ~2 minutes to render and preview the report.
Is this performance difference normal/expected and if so why? Given the nature of our application we can't really use trdx files due to their limitation. We also can't afford to take such a huge performance hit.
1 Answer, 1 is accepted
We tested the described scenario locally with the same report as a TRDX file (Standalone Report Designer) and as a report class displayed in the Windows Forms Report Viewer.
The sample report displayed 50000 records from the AdventureWorks sample database.
Test 1: Report Class
It takes ~10 seconds to show the first page of the report and ~80 seconds to render all pages of the report (2273 pages).
Test 2: TRDX
It takes ~10 seconds to show the first page and ~80 seconds to render all pages.
There is no difference between the performance of the TRDX file ran in the Standalone Designer and the report class displayed in the WinForms viewer.
Please see the attached project for reference.
To be able to investigate further, we will need a runnable sample project exhibiting the issue you described. You can open a new ticket and attach the requested files there.
Regards,
Nasko
Telerik