> also I was curious what serializer crossbar use so I put print in every
> serializers method serialize() and I see that crossbar use cbor and json
> at the same time and only one client ...why is that? why not cbor only?
Crossbar.io supports multiple serializers _at the same time_, and can translate transparently between clients using different serializers.
We support multiple serializers, because a) there are tradeoffs (eg JSON is fast in browsers, because it is native code) and b) different WAMP client languages have different levels of support for serializers.
> even if i put to my config serializers:["cbor"] nothing seems to change
Using this config, Crossbar.io will still _print_ all the available serializers at startup in the log, but only use CBOR - only clients supporting (and requesting) CBOR will be able to connect.