High performance Java APM. Powered by ASM. Try it. Test it. If you feel its better, use it.

An app performance monitor(APM) , like "Android Studio profiler", you can easily monitor the performance of your app real time in browser

make performance bottleneck detection easily when app blocked

Scouter is an open source APM (Application Performance Management) tool.

Automon combines the power of AOP (AspectJ) with monitoring or logging tools you already use to declaratively trace and monitor your Java code, the JDK, and 3rd party libraries.

Vibur DBCP - concurrent and dynamic JDBC connection pool

一个专注于优化我的世界服务端性能、减少延迟、修复服务端/其他常用插件BUG、限制或禁用破坏多人游戏平衡的游戏机制的插件（A plugin that focuses on optimizing minecraft server performance, reducing server lag, fix server and popular plugin bug, limiting or disabling the game mechanism that hurt multiplayer balances.）

Another repo for jamonapi.com which is primarily hosted on sourceforge

SKYProfiler is a performance monitoring tool for Integration Server. SKYProfiler tracks the service invocations and the monitored data can be seen in real time. This helps users track the time each service invocation takes and further drills down to the child service to identify which service contributes to time.

Sematext Monitoring Agent

Application Metrics for Java™ instruments the Java runtime for performance monitoring, providing the monitoring data visually with its built in dashboard

安卓客户端性能卡顿监控以及ANR治理辅助分析工具

An Android performance monitor | developer kit

Ease your work on Spring Boot applications: quickly generate functional non-regression tests, diagnose performance and generate non-regression tests on performance-related properties.

Java client to interact with Arize API

Appdynamics IoT Java SDK to monitor performance of embedded applications on connected devices

Performance monitoring for Java applications through execution time tracking and data export.

Watchr is a Java library that processes time-series data and generates HTML graphs. It is primarily used to track performance of subroutines over time.