[Bug 254381] bootloader is very slow

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254381

--- Comment #4 from Toomas Soome <tsoome at freebsd.org> ---
(In reply to Michael Galassi from comment #3)

OK, you have 8x16 font on 4k display and apparently the UEFI Blt() is not the
fastest one either... 

While we still have few options how to optimize the screen draw (but it will
take some time), there are few things... Of course the slowness itself is
coming from drawing the screen (12 was using uefi text output method). It is
good idea to check for firmware update, if there is one, it may improve things.

Second option is to reduce resolution - we are currently drawing a bit too
much, and 4k is large amount of data to be teransferred...

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