A. Make sure you are connected to a fiber internet connection.

B. Do not use a filter in the entry source to filter more than 50% of your contacts

C. Use an ETLtool such as Automation Studio for large-scale segmentation before admitting contacts into Journey Builder instead of filtering contacts within the entry source.

D. Create a pre-filtered, sendable copy of the data extension for each journey instead of using the same data extension for multiple journeys.

E. Create a userlD and permission set that will be used only for the configuration of Journey Builder processing.