// GENERATED CONTENT - DO NOT EDIT // Content was automatically extracted by Reffy into webref // (https://github.com/w3c/webref) // Source: High Resolution Time (https://w3c.github.io/hr-time/) typedef double DOMHighResTimeStamp; typedef unsigned long long EpochTimeStamp; [Exposed=(Window,Worker)] interface Performance : EventTarget { DOMHighResTimeStamp now(); readonly attribute DOMHighResTimeStamp timeOrigin; [Default] object toJSON(); }; partial interface mixin WindowOrWorkerGlobalScope { [Replaceable] readonly attribute Performance performance; };