Prior to JDK8 class metadata and constants would live in an area called the “permanent generation”, contiguous with the Java heap. One problem was that If the class metadata size is beyond the allocated bounds your app would run out of memory. With the advent of JDK8 we no longer have PermGen. The space where it was held has now moved to native memory to an area known as the “Metaspace”.
Mitchell Hashimoto released his book "Vagrant up and running" which covers everything from basic Vagrant usage to extending its functionality. In seven chapters he explains every aspect of Vagrant - from staring a default VM to extending it via plug-ins.
InfoQ brings together four experts in low latency Java to discuss some of the best practices when using Java in these situations.
In the world of application delivery, performance tuning still eludes the mainstream. InfoQ spoke to 5 luminaries of the performance monitoring space about it. The result was quite an active debate. 1
Moscrif is a cross-platform solution for mobile application development enabling developers to create native applications and games for smartphones, tablets and desktops.
Michael Slinn examines how to benchmark JVM concurrency options for JVM-based langauges including Java and Scala. 2
In this Q&A Martin Odersky draws the comparisons between F# and Scala, discusses the future of Scala, and addresses once and for all the question of breaking binary compatibility. 1
Java Performance, by Charlie Hunt and Binu John, provides performance tuning advice for both Java SE and EE applications. InfoQ reviews the book, and talks to the authors about their approach.
Google has previewed Dart, a new language with a VM but also a JS compiler. InfoQ looks beyond the grammar at Dart's contributions for building apps: Snapshots, Isolates, Modularity. 1
We talked with Martin Odersky, Chairman, Chief Architect and co-founder of Typesafe, about Scala.Net, the version of Scala that support .Net as well as about Scala in general.
While still a major user of Ruby and Rails, Twitter has gradually been moving more and more of its stack to Java and Scala. InfoQ spoke to Twitter engineer Evan Weaver to find out more. 13