service took long time to load driver when set to automatic

Hi all,

When a user mode service that set to manual load a file filter driver, it
took about 0.3 seconds. However, when I set the service to automatic, it
took about 120 seconds to load the driver.

I do not see other part of the service have this delay.

I am not quite sure what’s the implication here and hope someone can shed
some light what can cause performance hit.

Jack