Thanks for checking it out! 1) The agent is based on the Java Flight Recorder (https://en.m.wikipedia.org/wiki/JDK_Flight_Recorder https://en.m.wikipedia.org/w

Thanks for checking it out! 1) The agent is based on the Java Flight Recorder (https://en.m.wikipedia.org/wiki/JDK_Flight_Recorder https://en.m.wikipedia.org/wiki/JDK_Flight_Recorder) which is a technology built into the (Oracle/OpenJDK) JVM. The performance impact is thus rather small, around 1-2% of CPU. 2) To the best of my knowledge, New Relic and Dynatrace can't provide similar levels of JVM metrics (e.g. which methods allocate the most memory), since they are based on JMX metrics rather than flight recorder data. They do however have better APM functionality and framework integration than Blunders.