String interning about parca HOT 3 OPEN

There are some discussions on adding a package to stdlib golang/go#62483

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While we can certainly work towards improving the usage of strings, I don't see it being the highest contender for further improvements in Parca itself right now: https://pprof.me/a2522ef
Having said that, if someone wants to work on this, I don't think anyone is going to be opposed to merging those changes!

from parca.

Sounds good! It would be better to compare a memory footprint (resident set size) with and without string interning (i.e., storing only one copy of a string) on production where Parca receives lots of duplicate strings (labels, symbols). From what I understand, we won't see any difference in a heap profile; at least I didn't see a difference in benchmarks, but RSS and the size of structs that held interned strings were smaller (measured with github.com/DmitriyVTitov/size).

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