Rsocket - Reactive Cassandra less throughput

My use case revolves around retrieving the data from Cassandra using RSocket-Java in a non-blocking way. I use reactive cassandra template built on top of reactor-core. Throughput I see is very low in the range of 300 RPS compared to blocking http calls(800 RPS). If I remove Cassandra and use stub, I am getting close to 5000 rps. Can you please let me know whether RSocket-Java is not a perfect fit for above use cases? Sample non-blocking code is written similar to
https://github.com/OlegDokuka/rsocket-issue-717/tree/master/src/main/java/com/rsocket/examples” and Cassandra Connections are configured as mentioned here - “https://dzone.com/articles/reactive-streams-with-spring-data-cassandra”. Please help and advise.

Followed this at github issue -> https://github.com/rsocket/rsocket-java/issues/758