KeyValueQuery

Check performance of special case in KeyValueQuery to use SmallHashMap.getOrNull when possible instead of Map.get. This avoids an allocation for the Option and a little bit of overhead for the lambda invocation. For tight loops such as checking the query for a high volume streaming path it provides a noticeable benefit.

> jmh:run -prof gc -wi 10 -i 10 -f1 -t1 .*KeyValueQuery.*