Currently our middle-tier saves the rendered report to a pdf file and
then tells the client where the pdf file is.

Has anyone tried to stream this straight to IE through IIS instead of
saving it to disk? I think the writing is a bottle neck for us? Any
ideas?

Here's some background on how we're using Crystal:

My company has a 3 tier app written in VB/ASP. We support Oracle and
SQL Server databases. Reports are rendered using Crystal 8.5 on the
middle tier (i.e. not in IIS/asp) and exported to a PDF file under the
web server and then IE is redirected to the PDF file. We don't use
Crystal Enterprise or any of the viewers. Basically we're doing the
following:

   Set crxApp = New CRAXDRT.Application
   Set r = crxApp.OpenReport(sReportFileName, 1)
   With r.ExportOptions
      .FormatType = crEFTPortableDocFormat
      .DestinationType = crEDTDiskFile
      .DiskFileName = sUniqueNameUnderWebServer & ".pdf"
   End With
   r.Export False

Thanks,

Josh