Can you clarify what you mean by "kill goroutines?" Because my understanding was if you return while inside a goroutine it get's handled by the GC immediately, and (as someone else mentioned) you can use context to send deadlines/cancellation signals to go routines.
The ability to kill an arbitrary goroutine from the outside. To use context you need to write your specific goroutine such that it checks for cancellation and will eventually handle a cancellation request. This cannot be done with an arbitrary goroutine.
