MineCraft and off heap memory

Overview MineCraft is a really good example of when off heap memory can really help. The key requirements are: The…

Read More »

Making Unsafe safer

Overview If you use Unsafe directly, you risk crashing the JVM.  This happens when you access a page of memory…

Read More »

SharedHashMap vs Redis

Overview This is a comparison between OpenHFT’s SharedHashMap and a popular key-value store Redis. Any vendor will tell you how…

Read More »

Chronicle and low latency in Java

Overview I was watching this excellent presentation by Rolan Kuhn of Typesafe on Introducing Reactive Streams At first glance it appears that…

Read More »

Common Java Myths

These are questions which are likely to be too advanced to ask in any interview as they may just put…

Read More »

Java arrays, Wat!?

There is a few things you can do with arrays which are surprising.              …

Read More »

Common gotchas in Java

Overview Java is a minimalist language with deliberately less features than other languages, never the less it has edge cases…

Read More »

Hardware Transactional Memory in Java, or why synchronized will be cool again

Overview Hardware Transaction Memory has the potential to allow multiple threads to speculatively access the same data structure at the…

Read More »

sun.misc.Unsafe and off heap memory

The class sun.misc.Unsafe allows you to many of the things you shouldn’t be able to do in Java, but are…

Read More »