Have you ever wondered how does the HotSpot JVM generate identity hashcodes? (more…)

The Permanent Generation (PermGen) Heap is a heap in the JVM dedicated to storing the JVM’s internal representation of Java Classes (and also interned String instances). Usually, this heap is of a fixed size in the JVM and if it runs out of space then an... (more…)

Caches are often used as a cheap way to reduce latency and improve the performance of applications. Often we leverage libraries like Guava b... (more…)

java-class-tools - Read and write java class files in nodejs or browser. (more…)

As an engineer for the U.S. Digital Service, Marianne Bellotti has encountered vintage mainframes that are still being used in production — sometimes even powering web apps. Last month she entertained a San Francisco audience with tales about some of ...