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. 2026 Jul 17;14:e82924. doi: 10.2196/82924

Table 3.

Fast Healthcare Interoperability Resources (FHIR) resource counts, file size, import duration, and volume sizes corresponding to the Synthea record counts. The HAPI FHIR server was excluded from the largest record count benchmarks as the required disk space would exceed the available resources.

Records, n FHIR resources by type, n Synthea JSON file size

Patient Condition Observation Encounter Total Bulk Transaction
1000 1144 38,516 515,968 62,476 618,104 653 MB 1018 MB
5000 5760 202,166 2,963,729 339,867 3,511,522 3.6 GB 5.6 GB
10,000 11,481 402,577 5,915,941 683,151 7,013,150 7.2 GB 12 GB
50,000 57,538 2,047,676 30,371,746 3,475,991 35,952,951 37 GB 57 GB
100,000 115,153 4,075,593 60,168,356 6,925,962 71,285,064 73 GB 113 GB