Snapshots are currently Side-Eye’s main feature. A snapshot contains information about the distributed state of execution of a service at a point in time; it includes the stack traces of all the goroutines currently alive across all the processes that are part of the snapshot (both goroutines that are currently running on-CPU, and the many more goroutines that are blocked waiting for some asynchronous condition), plus variable data that was captured from different stack frames (i.e. functions currently being executed by some goroutine).