Real-time data processing pipeline and pacing control systems and methods

A data-processing system comprising:

• (i) a transaction bus, (ii) a console application in communication with the transaction bus, (iii) and a view predictor subsystem in communication with the transaction bus, each executing on at least one server comprising at least one processor and at least one memory storing computer executable instructions that, when executed by the processor, configure the processor to perform operations comprising:
• receiving, at the transaction bus from a user application executing on a client device, a call for visual information to be provided to the user application;
• in substantially real-time, prior to returning a result to the user application in response to the call for visual information:
• determining, by the view predictor subsystem, a likelihood that the visual information will be viewable within a viewport of the user application;
• computing a plurality of respective values for a plurality of sources of the visual information based on the likelihood and a respective priority for each source;
• providing, by the console application to the transaction bus, the set of potential sources of the visual information;
• and
• selecting, by the transaction bus, based on the computed values, one of the potential sources of the visual information to be the result;
• and
• providing the result, by the transaction bus, to the user application.