Ruby RabbitMQ clients blog

News and updates about various Ruby clients for RabbitMQ

Bunny 0.9.0 Final Is Released


Bunny 0.9.0 is released to

This release is a ground-up rewrite of Bunny that eliminates a lot of limitations of earlier versions, adds new features, improves throughput, makes Bunny benefit from runtime parallelism on Ruby implementations that support it and introduces other numerous improvements.

It is not entirely backwards compatible, although we’ve tried hard to make upgrading as seamless as possible.

This is a major step forward for Bunny. The library is now a feature complete, first class RabbitMQ client.

We encourage all Bunny users to upgrade to it.

Release Highlights

Feature Complete

Bunny 0.9 supports all RabbitMQ 3.x features, including extensions.

If something is possible to do with RabbitMQ over AMQP 0.9.1, you can do it with Bunny 0.9.

No More Limitations

Bunny 0.7.x and 0.8.0 did not support publishing of messages over 128 Kb in size and had limitations around asynchronous (“push”) consumers.

None of these limitations exist in 0.9.

Error Handling and Recovery

Bunny 0.9 introduces automatic recovery from network failures, much like amqp gem has.

Better Performance

Bunny 0.9 uses the same protocol serialization library as amqp gem. It has lower memory footprint and significantly more efficient: serialization throughput increased from 20% to x50 times compared to Bunny 0.8 serialization code.

Fewer memory allocations mean less GC stress and GC-induced CPU burn.


Bunny uses a separate thread for network activity. Consumers dispatch messages to a thread pool (by default of size 1) that can be tuned.

On Ruby runtimes that support runtime parallelism, this will increase throughput of both consumers and publishers on multicore hardware.

Improved Documentation

Bunny now has documentation guides that are on par or even better than amqp gem documentation.

Imprved TLS Support

Bunny’s TLS/SSL support is more flexible: more options available to configure when you need them.

RabbitMQ 2.x is the Minimum Supported Version

RabbitMQ 2.x is now the minimum supported version. 3.x releases are recommended.

Full Bunny 0.9 Change Log

Detailed Bunny changelog is available on GitHub.



Documentation guides:

API Reference

Getting Help & Reporting Issues


Michael on behalf of the Ruby RabbitMQ Clients Team