Скачать или смотреть Performance Costs of Synchronized Methods in Java: JDK Mission Control & JVM Flight Recorder Example

Here's an example of how to use JDK Mission Control and the JVM Flight Recorder to identify low latency issues caused by synchronized Java methods in your source code. Building on Marcus Hirt's latency example from his JMC and JFR tutorial, we demonstrate how to find latency issues in a Mission Control and fix code to address them. In this case, we simply remove the synchronized keyword from the log method and rerun the example in Java Flight Recorder. On the second JFR run, the method blocks are gone, there is no contention over the monitors, and the code runs without the Java latency problem. If you want a quick tutorial on JDK Mission Control and Flight Recorder, while learning about the impact of synchronized methods on performance, this JVM profiler example with JMC and JFR is for you.