Map with concurrent access

Question

When you use a map in a program with concurrent access, is there any need to use a mutex in functions to read values?

Answer 1

sync.Map has merged to Go master as of April 27, 2017.

This is the concurrent Map we have all been waiting for.

https://github.com/golang/go/blob/master/src/sync/map.go

https://godoc.org/sync#Map