The difference between Eventbus and Otto

Otto is another event bus library for Android; Actually it ' s a fork of guava ' s eventbus. Greenrobot ' s Eventbus and Otto share some basic semantics (register, post, unregister, ...), but there is differences which The following table summarizes:

	eventbus	Otto
Declare event Hand Ling methods	Name conventions	Annotations
Event inheritance	Yes	Yes
Subscriber Inheritance	Yes	No
Cache Most recent events	Yes, sticky events	No
Event producers (e.g. for coding cached events)	No	Yes
Event delivery in posting thread	Yes (Default)	Yes
Event delivery in main thread	Yes	No
Event delivery in background thread	Yes	No
aynchronous Event delivery	Yes	No

Besides features, performance is another differentiator. To compare performance, we created an Android application, which are also part of this repository (eventbusperformance). You can also run the app. your phone to benchmark different scenarios.

Benchmark results indicate that eventbus are significantly faster in almost every scenario:

	Eventbus	Otto
Posting events, Android 2.3 emulator	~70% faster
Posting events, S3 Android 4.0	~110% faster
Register subscribers, Android 2.3 emulator	~10% faster
Register subscribers, S3 Android 4.0	~70% faster
Register subscribers cold start, Android 2.3 emulator	~350% faster
Register subscribers cold start, S3 Android 4.0	About the same

The difference between Eventbus and Otto