Looks like some ActionCable actions are missing ActiveSupport notifications. Now that we have e.g. “perform_action” and “broadcast” instrumented, I suppose it’d be good to do the same for other important calls, namely: “open”, “close”, “subscribed” and “unsubscribed”. I have this implemented in my fork: Add ActiveSupport::Notifications instrumentations around methods hand… · xlts/rails@2d9bb31 · GitHub. Would it be reasonable to submit a PR?