@erau7​ It's a little bit of a mixture as it depends on what you're doing in the workspace. But in most cases you should probably assume it's the former. For example, if you are using FeatureJoiner, then that's a 'blocker' transformer and it needs to wait for all the data to arrive before it knows what joins to make. If you want to ensure each file is processed separately you can use WorkspaceRunner or Batch Deploy

Thank you, this is exactly what I was looking for.