It improves:

ZEO:             ~500μs ->  ~470μs
NEO/pylite:      ~640μs ->  ~460μs      (Cpy)
NEO/pylite:      ~415μs ->  ~350μs      (Cgo)
NEO/pysql:      ~1300μs ->  ~790μs      (Cpy)
NEO/pysql:       ~850μs ->  ~650μs      (Cgo)
NEO/go:          ~350μs ->  ~275μs      (Cpy)
NEO/go:           ~78μs ->   ~78μs      (Cgo)
NEO/go-nosha1:    ~45μs ->   ~45μs