[FEATURE] Proper inlining of functions

[dannyhammer]

Description:
Many of the functions (especially under board/) have the #[inline(always)] attribute. It would be good to run some tests comparing the different inlining attributes that Rust offers. Not all of these functions may need to be forcibly inlined.

Relevant Link(s):

• https://nnethercote.github.io/perf-book/inlining.html

Requirements:

• Test difference between inline and inline(always)
• Determine which, if either, is better