sync.Map in Go!📺 https://youtu.be/BywIJqYodl4
People never read past the first paragraph of the docs. So here is the rest (which says “never use sync.Map unless you are doing this one really obscure thing that most never do”):
The Map type is specialized. Most code should use a plain Go map
instead, with separate locking or coordination, for better type
safety and to make it easier to maintain other invariants along with
the map content.
The Map type is optimized for two common use cases: (1) when the
entry for a given key is only ever written once but read many times,
as in caches that only grow, or (2) when multiple goroutines read,
write, and overwrite entries for disjoint sets of keys. In these two
cases, use of a Map may significantly reduce lock contention
compared to a Go map paired with a separate Mutex or RWMutex.
Tags:
#golang #tips