Go v0.0.0

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The Go Blog Flight Recorder in Go 1.25 Carlos Amedee and Michael Knyszek 26 September 2025 In 2024 we introduced the world to more powerful Go execution traces. In that blog post we gave a sneak peek into some of the new functionality we could unlock with our new execution tracer, including flight recording. We’re happy to announce that flight recording is now available in Go 1.25, and it’s a powerful new tool in the Go diagnostics toolbox. Execution traces First, a quick recap on Go execution traces. The Go runtime can be made to write a log recording many of the events that happen during the execution of a Go application. That log is called a runtime execution trace. Go execution traces contain a plethora of information about how goroutines interact with each other and the underlying system. This makes them very handy for debugging latency issues, since they tell you both when your goroutines are executing, and crucially, when they are not. The runtime/trace package provides an API for collecting an execution trace over a given time window by call