The shinkansen is faster than a normal train.
We had a competition to see who could swim from Portland to Tokyo the fastest.
In my family, we eat dinner really fast.
Just like the meaning of the kanji (fast) this adjective also means fast.
Remember how 早い means "early"? If you are early to something, it probably means you moved fast to get there. These two words share a reading (and have similar meanings, in a way, as well!).