There is no way to answer your question on the basis of the (lack of) information you've provided.

The first questions I have are:

• Why are you sharing a hash?
• What are the keys to the hash?
• Does the information being stored in the value associated with each key come from a single preprocessor; or is it accumulated from multiple preprocessors?

  If it is from a single preprocessor, why does it need to be shared through a hash?

  If it is accumulated from multiple preprocessors; how will the processing app know when any given key is ready for post processing?

And many more question arise depending upon the answers to those.

Basically, until you describe what information is being passed from the preprocessors to the processor; how that information is keyed; and how it is derived and/or accumlated; any response to your question is an uneducated guess.