Slow archive/file access

https://stackoverflow.com/questions/55873174/how-do-i-return-an-image-in-fastapi

https://github.com/fastapi/fastapi/issues/2302

https://github.com/fastapi/fastapi/issues/4807

The StreamingResponse used in serving archives and raw files is causing slow performance. The StreamingResponse wraps a sync generator into an async one.

This results in huge overhead due to context switching.