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Author Archives: Per Minborg

I am a guy living in Palo Alto, California, but I am originally from Sweden. I am working as CTO on Speedment with Java and database application acceleration. Check it out on www.speedment.com

Java 20: A Sneak Peek on the Panama FFM API (Second Preview)

The new JEP 434 has just seen daylight and describes the second preview of the ”Foreign Function & Memory API” (or FFM for short) which is going to be incorporated in the upcoming Java 20 release! In this article, we will take a closer look at some of the improvements made from the first preview that debuted in Java 19 ...

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Which JVM Version is Fastest?

How is a high-performance, low-latency Java application affected by the JVM version used? Every nanosecond counts for trading and other applications where messages between two different threads are exchanged in about 250 ns! Read this article and find out which JDK variant comes out at the top! Benchmarks This article will use open-source Chronicle Queue to exchange 256-byte messages between ...

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How to Reduce Cloud Cost by 99% for EDA Kafka Applications

java-interview-questions-answers

While the cloud offers great convenience and flexibility, the operational cost for applications deployed in the cloud can sometimes be significant. This article shows a way to substantially reduce operating costs in latency-sensitive Event-Driven Architecture (EDA) Java applications by migrating from Kafka to Chronicle Queue open-source, a more resource-efficient and lower-latency queue implementation. What is EDA? An EDA application is ...

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Did You Know the Fastest Way of Serializing a Java Field is not Serializing it at All?

This article elaborates on different ways of serializing Java objects and benchmarks performance for the variants. Read this article and become aware of different ways to improve Java serialization performance. In a previous article about open-source Chronicle Queue, there was some benchmarking and method profiling indicating that the speed of serialization had a significant impact on execution performance. After all, ...

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How the Java Language Could Better Support Composition and Delegation

This article outlines a way of improving the Java language to better support composition and delegation. Engage in the discussion and contribute to evolving the Java Language. The Java language lacks explicit semantic support for composition and delegation. This makes delegating classes hard to write, error-prone, hard to read and maintain. For example, delegating a JDBC ResultSet interface entails writing ...

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Java: How Object Reuse Can Reduce Latency and Improve Performance

Become familiar with the art of object reuse by reading this article and learn the pros and cons of different reuse strategies in a multi-threaded Java application. This allows you to write more performant code with less latency. While the use of objects in object-oriented languages such as Java provides an excellent way of abstracting away complexity, frequent object creation ...

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Java: Why a Set Can Contain Duplicate Elements

In low-latency applications, the creation of unnecessary objects is often avoided by reusing mutable objects to reduce memory pressure and thus the load on the garbage collector. This makes the application run much more deterministically and with much less jitter. However, care must be taken as to how these reused objects are used or else unexpected results might manifest themselves, ...

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Java: Creating Terabyte Sized Queues with Low-Latency

Queues are often fundamental components in software design patterns. But, what if there are millions of messages received every second and multi-process consumers need to be able to read the complete ledger of all messages? Java can only hold so much information before the heap becomes a limiting factor with high-impacting garbage collections as a result, potentially preventing us from ...

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Why General Inheritance is Flawed and How to Finally Fix it

By leveraging composition and the final keyword in the right way, you can improve your programming skills and become a better Java programmer.   General inheritance, whereby a public class is extended over package boundaries, provides a number of challenges and drawbacks and should be avoided in almost all cases. Classes and methods can be made final meaning that subclassing is ...

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