[Bug 194635] Speed optimisation for framebuffer console driver on Raspberry Pi

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194635

--- Comment #9 from Stefan Berndt <stefan.berndt at imoriath.com> ---
It's no surprice one 32bit operation is faster than four 8bit operations, since
computers having data bus systems wider than 8bit. Even the ~35 years old 8086
already has a 16bit wide data bus...

I have got the 11.0-CURRENT on my raspberry, and made the speedtest again.
(time taken to print and sroll 1 milion lines at 1440x900 in VT mode)

16 Bit per Pixel: 918 Secends
24 Bit per Pixel: 1133 Secends
32 Bit per Pixel: 903 Secends

It seems there is some space for optimisations. I will show at the vt code in
near future.

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