Glowroot is an open source Java APM (Application Performance Monitoring) tool that allows you to easily monitor the performance of your applications. With Glowroot, you can quickly identify and resolve any performance issues, helping you optimize your application's speed and efficiency. One of the main strengths of Glowroot is its simplicity. It is incredibly easy to use and can be set up in no time.

Simply download and unzip the Glowroot package, add the Java agent to your application's JVM args, and access the Glowroot dashboard in your browser. You'll be able to visualize and analyze all the important performance data in a user-friendly interface. Not only is Glowroot easy to use, but it also has very low overhead. Thanks to extensive microbenchmarking and tuning, Glowroot ensures that the impact on your application's performance is minimal, typically in the low microseconds.

Users have praised Glowroot for its simplicity and usefulness, with many stating that it has helped them resolve performance issues quickly. Glowroot is licensed under the Apache License v2. 0, and its documentation is under CC BY 3. 0.