RabbitMQ 3.12 will be released soon with many new features and improvements.
This blog post focuses on the the performance-related differences.
The most important change is that the
lazy mode for classic queues is now the standard behavior (more on this below).
The new implementation should be even more memory efficient
while proving higher throughput and lower latency than both
non-lazy implementations did in earlier versions.
For even better performance, we highly recommend switching to classic queues version 2 (CQv2).