concurrent-map

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For example, In regular map

var data = map[string]map[string]string{}

data["a"] = map[string]string{}
data["b"] = make(map[string]string)
data["c"] = make(map[string]string)

data["a"]["w"] = "x"
data["b"]["w"] = "x"
data["c"]["w"] = "x"

How to do this kind of nested map using concurrent Map? Any Idea

You need to do type assertion with ConcurrentMap type to the nested concurrent map:

var data = cmap.New()
if v, ok := data.Get("key"); !ok {
  data.Set("nested_key", cmap.New())
} else {
  nested := v.(cmap.ConcurrentMap)
  nested.Set("key", "value")
}

Has anyone done benchmarking with nested cmaps?