Introducing the new features of Java 9

In this chapter, we will explore many under the cover improvements to performance that you automatically get by just running your application in the new environment. Internally, string changes also drastically reduce memory footprint requirements for times when you don't need full-scale Unicode support in your character strings. If most of your strings can be encoded either as ISO-8859-1 or Latin-1 (1 byte per character), they'll be stored much more efficiently in Java 9. So, let's dive deep into the core libraries and learn the underlying performance improvements.