Cross-Origin Resources and Resource Timing

I have a question on cross-origin resources. Does the current spec state that when the document is loaded from www.mydomain.com<http://www.mydomain.com> that I will not get any timing information from www.yourdomain.com<http://www.yourdomain.com> ? This would make it impossible to monitor third party resources.

Thanks for any clarification on this point.

// Alois