File Service Performance
File operations over the Internet require much more than the usual direct access to a file on a local hard drive. They include networking over distances and firewall security. Therefore, the architecture differs from local files accessed directly from a service tier.
The file service is designed to balance the tradeoff between performance, security, stability, ease of installation, and the load on Business Central. Every request to a local file system includes a round trip between Business Central and a local service.
A round trip typically takes 1-3 seconds to complete. This time depends on the polling strategy and the distance between the systems. If you are performing multiple file operations, you can batch them, which significantly reduces the number of roundtrips.