can user dfu boot connection speed be as fast as the system boot?

hi!

i'm using stm32L4r9Ai.

i programmed user dfu boot (from 0x08000000 ~ 0x0800C000).

read, write, and erase operations are also performed normally in cubeprogrammer.

one problem is the speed at which the cube programmer connects to the device in the dfu boot state.

It is fast when connecting to a device in system memory boot state. It takes less than a second.

but, it takes about 6 seconds to connect to a device in the user dfu boot state. its too slow.

usb speed setting is the same in the image below.

Is there a reason why the difference occurs and a way to solve this difference?

thanks!

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