I am creating PDF files by way of ActiveServerPages that call an ActiveReports DLL. I have been testing the ActiveReports with a load testing tool and have found that the AR reports perform better when the DLL compile option is set to 'Single Threaded' model as compared with 'Apartment Threaded'. I'm testing this on a Dual Processor Server. Has anyone experienced this? Or have any suggestions? Does it have something to do with an ActiveX Designer in the Project? There is a random number function inside the project, could this be a problem with concurrent users?

My load test is 60 concurrent users that access a complex report (around 200 pages long). To complete the processing of this:

It takes the 'Single Threaded' test around 15 minutes to complete.

It takes the 'Apartment Threaded' test around 20 minutes complete.

Thanks for you help.

Ben Thompson