CORRECTION - resource timing is not disallowed entirely; only network timing details (to calculate latency, etc.) are disallowed. Sharing resources across page

CORRECTION - resource timing is not disallowed entirely; only network timing details (to calculate latency, etc.) are disallowed. Sharing resources across pages based on has values would render this restriction moot. From http://www.w3.org/TR/resource-timing/ http://www.w3.org/TR/resource-timing/: "Statistical fingerprinting is a privacy concern where a malicious web site may determine whether a user has visited a third-party web site by measuring the timing of cache hits and misses of resources in the third-party web site. Though the PerformanceResourceTiming interface gives timing information for resources in a document, the cross-origin restrictions prevent making this privacy concern any worse than it is today using the load event on resources to measure timing to determine cache hits and misses."