Elements that have a set width become wider when they have padding and/or border-width. To avoid these problems, make use of the now common box-sizing: border-box; reset.
Over the years many Java developers have asked, "How much memory
does a Java object consume?" In this Java Tip,
Vladimir Roubtsov explains problems with previous solutions. In
addition, based on his experience exploring memory usage, he offers
a few tips on working around some Java inefficiencies.