.

Presenting

The Diabolical Developer's Guide to Performance Tuning

and

The JVM as a Platform for Building Smart Contracts

by

Ben Evans and Martin Verburg of jClarity

Doors Open 18:15pm

This month, for the first time, we are incredibly privileged to welcome Java Champion Martin Verburg @Karianna and jClarity co-founder Ben Evans @Kittylyst

Martin Verburg

Martijn Verburg is the CEO and co-founder of jClarity a Machine Learning based Java/JVM performance analysis company. and is the co-leader of the London Java User Group. He also leads the global Adopt a JSR and Adopt OpenJDK efforts to enable the community to contribute to Java standards and OpenJDK. He was recently made a Java Champion in recognition for his contribution to the Java ecosystem.

Martijn is the co-author of "The Well-Grounded Java Developer" on Java 7, Polyglot Programming on the JVM and modern software development techniques. Martijn also acts as a community lead for the PCGen and Ikasan open source projects, moderates at the Javaranch and can be found answering thorny questions on the programmers stack exchange sub-site.

Martijn is a popular speaker at major conferences (JavaOne, JFokus, OSCON, Devoxx etc) where he is known for challenging the industry status quo as "the Diabolical Developer".

Ben Evans

Ben Evans is an author, speaker, consultant and educator. His career highlights to date include: Co-founding jClarity, a performance startup, Chief Architect for Listed Derivatives at DB, performance testing the Google IPO, building award-winning websites for some of Hollywood's biggest hits of the 90s, building multibillion dollar low-latency trading systems and designing technology to help some of the UK’s most vulnerable people.

Ben is a Java Champion, JavaOne Rockstar Speaker award and a Java Editor at InfoQ. He represents the user community as a voting member on the Java Community Process Executive Committee.

Ben is author of “The Well-Grounded Java Developer”, “Java: The Legend”, the new edition of “Java in a Nutshell” and the forthcoming "Optimizing Java". He is a regular speaker and educator on topics such as the Java platform, systems architecture, security, performance and concurrency at companies and conferences all over the world.

The Diabolical Developer's Guide to Performance Tuning by Martin Verburg

The Diabolical Developer shows you the steps to take when you get a call at 3:00am saying that your Java / JVM application is too slow. He introduces the Performance Diagnostic Methodology (PDM) which focuses on how to quickly hone into the root cause of a bottleneck and what steps you can take to fix it. After this session you should only have to take hours, instead of days or weeks to pinpoint performance issues in your apps.

The JVM as a Platform for Building Smart Contracts by Ben Evans

In this talk, Ben will introduce some fundamentals of cryptocurrency, before diving deep into Java bytecode and classloading, to discuss a new way to make the JVM environment suitable for running 'smart contracts'. These contracts have applications to distributed cryptographic ledgers, blockchains and cryptocurrencies. Ben will then introduce a real example based on R3's Corda ledger (part of the Hyperledger project) and discuss some future directions and practical applications.

Developers who are interested in learning more about the JVM's bytecode and classloading subsystems should attend. No previous knowledge or experience of distributed ledgers, cryptocurrency or blockchains is required.

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