Backup set metadata is received, wherein the backup set metadata comprises information about backup data sets that are received by a backup storage system that stores the backup data sets. The manner in which the backup data sets flow through a processing flow path of the backup storage system is emulated. One or more processes that process the backup set metadata through an emulated processing flow path are executed, wherein the emulated processing flow path is indicative of the manner in which the backup data sets flow through the processing flow path of the backup storage system when the backup storage system stores the backup data sets. One or more timing statistics are calculated based on the flow of the backup set metadata through the emulated processing flow path.