In this post we are benchmarking Kryo v4 against its predecessors v2 and v3. Somewhere mid-2016 version 4.0.0 of the Kryo high performance serialization library has been released. It is time to take a look atRead More…
14Dec/16
12Dec/16
Fast made faster: Kryo and Externalizer4J
Kryo and Externalizer4J are a great match. Even though Kryo serialization offers fast, zero-effort serialization already, in combination with Externalizer4J you can squeeze even better performance out of Kryo. Kryo and Externalizer4JRead More…
03Dec/16
JVM : video resources
The Java Virtual Machine (JVM) is a very sophisticated piece of engineering. This post collects a series of videos to help you get a sense of what the JVM does behind theRead More…
Java interview: how many ArrayList classes are there?
Need an interview question to hire a senior Java developer? How about this one: how many ArrayList classes are there in the JDK? Yes, you heard it correctly: how many classes called ArrayList canRead More…
Hazelcast serialization performance
A few years ago Peter Veentjer wrote an interesting post which compares the performance of Hazelcast’s serialization APIs with that of plain Serializable. This post shows the results obtained with Externalizer4J’s support forRead More…
3 mistakes you can make when implementing Externalizable
The JDK’s java.io.Externalizable interface is simple to implement. Just 2 methods to implement and you are ready to go. Unfortunately there are a few ways you can shoot yourself in the foot.Read More…
25Nov/15
Avoid serializing empty collections
Serializing empty collections can be surprisingly wasteful! This post describes a technique which speeds up things and reduces the data size! And the principle behind this technique is simple: avoid serializing empty collections. If your objects containRead More…
How Java serialization deserializes final fields
Implementing readObject() or readExternal() for immutable objects is a problem. We show how the JDK uses Unsafe to assign values to final fields. Did you ever wondered how Java serialization can set finalRead More…