Currently InspectorInstrumentation::registerInstrumentingAgents is called in InspectorController constructor which is suboptimal as it is enough to register corresponding InstrumentingAgents only while front-end is attached to the InspectorController.
Created attachment 183184 [details] Patch
Comment on attachment 183184 [details] Patch Clearing flags on attachment: 183184 Committed r140015: <http://trac.webkit.org/changeset/140015>
All reviewed patches have been landed. Closing bug.