The runtime/trace package in Go provides a powerful tool for understanding and troubleshooting programs by producing execution traces of each goroutine. These traces can reveal hard-to-spot issues, such as concurrency bottlenecks, and can be visualized and explored using tools like gotraceui. Historically, there have been challenges with trace overhead, scalability, and ease of analysis. However, recent improvements in Go 1.22 have drastically reduced overhead and made traces more scalable. Additionally, features like flight recording and a trace reader API have been introduced to make continuous tracing and trace analysis more accessible, thanks to contributions from the Go community.
https://go.dev/blog/execution-traces-2024