Explore profiling and observability techniques for Go applications in this comprehensive conference talk from GopherCon 2021. Learn how to reduce costs, improve latency, and debug issues like memory leaks and performance regressions. Gain insights into the Go runtime's unique features and understand the built-in CPU, Memory, Block, Mutex, and Goroutine Profilers, as well as the Runtime Tracer. Discover advanced tools such as eBPF, Linux Perf, and Delve for optimizing and debugging Go applications. Follow along as the speaker covers topics including scheduling, memory management, profiling techniques, tracing, overhead analysis, and observability tools, providing a solid foundation for improving Go application performance and troubleshooting skills.