Performance comparaison betwen ff4j and togglz

We're working on a project , and we want to use some toggling feature tool like ff4j or togglz but we have a real constraints about performances, i mean we really need a tool with the less time of execution , i've checked a little bit ff4j and togglz but i don't know what is best for this solution, or may be if you know some other tools.

Context of project: its a netflix microservices architecture, so we have eureka,ribbon,zuul and microservices.

otherwise , if you have another solution , may be develop a sidecar please give me some ideas.

thank you in advance :)

Disclaimer : I created FF4j, as such I won't give you answer relative to performance comparison. I will provide architecture design principles.

Microservices means distributed architecture so you will have to store the state of your features in a common persistence storage (DB).

The cost of feature toggle framework won't be time to evaluate the feature state predicate (it is a simple condition) it will be the time to access the data from the persistence storage.

FF4j provides support for both REDIS and CONSUL:

• Redis seems a good candidate as very fast for put/get and distribute.
• Consul is also a good idea in distributed microservice : it provides a key-value store.
• Eureka may does the same, I don't know, ff4j does not have store for it yet.

If you have to store your features in a slower DB such as SQL-Like then you might consider to use caching. FF4j provides some cacheProxy to handle such use cases.

Other Considerations :

• Put the administration console only in a backend application not on each microservices (security + performance overhead)
• Feature Toggle can do more with Configuration Management and monitoring.

You may want to have a look at this 15min talk exactly on that subject. LIVE DEMO starting at 7:10

and related github repository for sample with Spring-Cloud