ASP takes a lot of processor time to read data from a client and then transfer the data from IIS process (inetinfo.exe) to asp process (dllhost.exe). One client uploading huge files with good internet connection can cause other asp pages on your internet server slow down. Response times to other clients accessing your asp pages at the same time of upload can be worse then.
You can set a little bit less thread priority for the thread reading upload data using
ThreadPriority property. Windows will handle other requests than upload with higher priority. ASPForm uses the priority only during
Read method.
ASPForm calls SetThreadPriority Win32 API function with
ThreadPriority value before
Read method and with tpNormal after
Read.