Explore the performance enhancements and potential pitfalls of upgrading to Java 9 in this 54-minute Devoxx conference talk. Delve into the impressive 91 JEPs included in JDK 9, focusing on the quarter dedicated to performance improvements. Examine changes in the language, core libraries, and JVM itself. Learn about new features like Compact Strings, improved String operations, and enhanced Collections. Discover the benefits of the new default Garbage Collector and the Invoke Dynamic approach. Gain insights into possible performance regressions and considerations for upgrading. By the end of this talk, acquire the knowledge needed to evaluate whether the effort of upgrading to Java 9 is worthwhile for your projects.
JDK 9 - The Performance Bits or Why You Would Really Want to Upgrade to Java 9
Overview
Syllabus
Intro
Release cadence
Performance
GURL
Default GC
Compact Strings
String
String operations
String concatenation
String builder
String constructor
Invoke Dynamic
String builders
Collections
Lists
List
Special cases
Stack walking
Stack trace
Standard Java 8
New API
Native approach
Recap
Question
Taught by
Devoxx
