Talk Details

How many times have you implemented a clever performance improvement, and maybe put it in production, because it seemed the right thing™ to do, without even measuring the actual consequences of your change? And even if you are measuring, are you using the right tools and interpreting the results correctly? During this workshop we will use a real-world example, the new virtual threads friendly Jackson objects pool used in Quarkus, to demonstrate how through incremental steps we measured and improved its performances in a highly concurrent environment. We will illustrate how we used JMH for this purpose, explaining why it is the only reliable tool to be used when benchmarking Java applications, how to avoid the most common pitfalls and how to leverage its features to develop meaningful and useful benchmarks.