// GENERATED CONTENT - DO NOT EDIT // Content of this file was automatically extracted from the High Resolution Time spec. // See https://w3c.github.io/hr-time/ typedef double DOMHighResTimeStamp; [Exposed=(Window,Worker)] interface Performance : EventTarget { DOMHighResTimeStamp now (); readonly attribute DOMHighResTimeStamp timeOrigin; [Default] object toJSON(); }; partial interface WindowOrWorkerGlobalScope { [Replaceable] readonly attribute Performance performance; };