DevOps Guide to Java Profiling - DevOps.com
Briefly

Java profiling can be used in various stages of the software development life cycle (SDLC). During development, it can help identify bottlenecks and performance hotspots, which can then be optimized for better performance. In the testing phase, profiling can be used to verify that the application performs as expected under load. Finally, in production, profiling can be used to monitor application performance and detect potential problems before they affect users.
Performance tuning plays a vital role in DevOps by enhancing the efficiency and scalability of applications. Efficient applications use fewer resources, which reduces costs and allows for more users or larger workloads. Scalability is the ability of an application to handle increased workloads without a decrease in performance.
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