Tracing Java's Hidden Performance Traps

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About this talk

Painful days spent optimizing the wrong part of a flow. Repeated attempts to blindly fix a performance issue. Speculative micro-"optimizations" that clutter the code with no measurable benefit. Only to later trace the problem to the most unexpected cause. This talk explains how to correctly zoom in on a performance bottleneck using distributed tracing, metrics, and method profiling. We learn to read a flame graph, then we review a series of bottlenecks typical for backend systems, like connection pool starvation, time-consuming Aspects, network calls, CPU hotpoints, lock contention, and Virtual Thread pinning. Join this session and prepare for the performance issues that any successful system will eventually have.