Speed up Data App Start

Hi,

We have created a local Data App which works fine. However when the App is started, the whole workflow is computed. We wanted to speed up the process with a little trick: if there hasn’t been any file uploaded, there “is” no workflow to compute in the beginning. The upload would then trigger the workflow for the first time. So when the “empty” Component is started, it’s super fast, because it’s just the Upload Widget and nothing more.
However we are having a hard time setting things up. This would be the rough workflow. Any ideas who to make this run? Any hint would be highly appreciated.

Thanks a lot!