Make use of PGO

on golang `1.21` [PGO](https://go.dev/doc/pgo) was released, and we can make use of it.

Just preliminary idea:
1. Before releasing new version we would run it against single node cluster collecting profile data.
2. Build optimized binary with `go build -pgo=run.pprof` 
3. Release both optimized and non-optimized versions