Douglas Hawkins
ÜberConf
Denver · July 19 - 22, 2016
Lead Developer Java Performance Monitoring at Datadog
Douglas Hawkins has been passionately developing software for the past 20 years.
Throughout Doug's career, he has focused on creating performance intensive applications
in Java ranging from bioinformatics to financial exchanges.
After 10 years as a Java developer, Doug transitioned to working on Azul's Java Virtual Machine.
Today, Doug continues his interest in building performance tools for developers as the
Lead Developer of Datadog's Java Application Performance Monitoring.
While Doug's passion for developing software remains, his true passion is in sharing his
interest in low-level details and JVM performance with others.
Presentations
Concurrency Concepts in Java
Unlike earlier languages, Java had a well-defined threading and memory model from the beginning. And over the years, Java gained new packages to help solve concurrency problems.
Despite this, Java concurrency is sometimes subtle and fraught with peril.
How (Not) To Measure and Profile Java Performance
Today, we all benefit from the sophistication of modern compilers and hardware, but that extra complexity can also make it difficult to reason about performance.
Java Optimizations That Matter (and Some That Don't)
Early releases of Java performed poorly, but those issues largely disappeared long ago with the introduction of HotSpot. However, much of the performance advice for Java persists through hearsay from those early days.
Architecting with Garbage Collection in Mind
HotSpot provides a variety of garbage collectors with a variety of strengths and weaknesses. To get the most out of our applications, we need to pick the right garbage collector and design to take advantage of its strengths and avoid its
weaknesses.
How HotSpot Sees Your Code
Just as a database creates an execution plan to run your SQL queries, HotSpot analyzes your Java code to determine how to best to run your code. And just as with a database where understanding indexes is important to achieving performance, there are a few core concepts that important to understanding Java performance.