Of course, at the end of the day these tricks are trying to compensate for one computer part: the hard drive. It is by far the slowest part of any modern computer.
While the rest of the computer is operating in nanoseconds and microseconds, a hard drive works in milliseconds, which is more than a thousand times slower. Your processor and RAM can spend precious time just waiting around for information to arrive.
That's why solid-state hard drives are gaining popularity. If you aren't familiar with the term, or haven't looked at them in a while, let me explain what an SSD is, how it can supercharge your computer and whether or not it's finally time to buy one.