dictionary - Computing the memory footprint (or byte length) of a map

Question

I want to limit a map to be maximum X bytes. It seems there is no straightforward way of computing the byte length of a map though.

"encoding/binary" package has a nice Size function, but it only works for slices or "fixed values", not for maps.

I could try to get all key/value pairs from the map, infer their type (if it's a map[string]interface{}) and compute the length - but that would be both cumbersome and probably incorrect (because that would exclude the "internal" Go cost of the map itself - managing pointers to elements etc).

Any suggested way of doing this? Preferably a code example.

Answer 1

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