Fastest to Slowest: Rolling (Bottom Right), L-Jumping (Bottom Left), Holding L (Top Right), Walking (Top Left)
Listed are various movement forms and their speeds:
Standard walking (10.8)
Walking while holding L (10.4)
Dashing
Rolling
Boosting
Some other notes:
While you have a faster walking speed without holding L, you accelerate to that speed faster while holding the L button. (see also: The L Button)
There is no sideways speedcap, this makes turning or moving sideways
In Metroid Prime, movement is the highest priority of the game; it is very important to get the fundamentals down, as this is what helps you improve and go faster.
The Basics
This is some of the basic tech you should get down.