Flight Recorder in Go 1.25

Go 1.25 introduces flight recording, a new diagnostic tool that captures execution traces in memory and allows developers to snapshot the last few seconds of execution when problems are detected. This feature is particularly useful for long-running web services where issues occur unpredictably. The post demonstrates how to use flight recording to debug a performance problem in an HTTP server, showing how to configure the recorder, capture snapshots when slow requests are detected, and analyze the resulting traces to identify root causes like improper mutex usage.