{"json_modified": "2016-03-28T08:29:08.344277", "uuid": "2cdf09a1-f5b7-494d-9098-62b77cc3d316", "title": "PerformanceTiming.responseStart", "url": "/en-US/docs/Web/API/PerformanceTiming/responseStart", "tags": ["API", "Navigation Timing", "Read-only", "PerformanceTiming", "Reference", "Property", "R\u00e9f\u00e9rence"], "translations": [], "modified": "2015-04-07T01:56:41", "label": "PerformanceTiming.responseStart", "localization_tags": [], "locale": "en-US", "id": 81499, "last_edit": "2015-04-07T01:56:38", "summary": "The <code><strong>PerformanceTiming</strong></code><strong><code>.responseStart</code></strong> read-only property returns an <code>unsigned long long</code> representing the moment in time (in milliseconds since the UNIX epoch) when the browser received the first byte of the response from the server, cache, or local resource.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Summary", "title": "Summary"}, {"id": "Syntax", "title": "Syntax"}, {"id": "Specifications", "title": "Specifications"}, {"id": "Browser_compatibility", "title": "Browser compatibility"}, {"id": "See_also", "title": "See also"}], "slug": "Web/API/PerformanceTiming/responseStart", "review_tags": []}