High CPU during calls also with same codecs

[epasqualotto]

Dear all, I've setup webrtc2sip and SIPml5 using Asterisk as SIP server.
All works well but I'm confused about the CPU utilization, also when I make a video-call between two sipml5 the resource on the server are used at almost 100%.
My setup have webrtc breaker and SSL enabled.

There's something that can help me? There's no way to make the RTP direct between browsers when codec are the same?

Thanks