request_firmware question

Hi,

Now I have switched to using request_firmware api
and after using firmware, memory is being released.
Does it save kernel memory compare to case when 
I am having a having a local static firmware buffer(very big)
from which I used to get the firmware and write it
to the chip?

As I know request_firmware api has several advantages
but what I want to know is the advantages related
to kernel memory footprint.

Thanks for the help.

ps:I asked the same question in #kernelnewbies IRC