Project Valhalla has posted a major update and has announced some initial, very early-stage design concepts for value types in the JVM.

Method and variable handles vs. Java reflection To truly understand MethodHandles and VarHandles —what they do and why they are useful—it’s helpful to know a few things about reflection in Java.

And it’s all still written in Ruby; signature support bloated the compiler up to a whopping 178 lines of code, most of that for dealing with the JVM opcodes for primitive types.

The boxing and unboxing of Java primitive types has severe performance implications. Uncover the truth about autoboxing Java primitive types in this JDK Mission Control and JVM Flight Recorder example ...