This is a bit of a stretch. The purpose of the service has to be processing jpegs where they are expected to be bad. Moreover, they have to be mostly bad; i.e. the service is specifically intended for finding rare good jpegs in a deluge of bad ones, as quickly as possible.

In a situtaion where are more bad jpegs than good ones, we still don't necessarily care that they cause the slow path, if the purpose of the service is doing meaningful processing with good jpegs.