Returns resource timing information for the given request. Most of the timing values become available upon the response, responseEnd becomes available when request finishes.
Request start time in milliseconds elapsed since January 1, 1970 00:00:00 UTC.
domainLookupStart
number
Time immediately before the browser starts the domain name lookup for the resource. The value is given in milliseconds relative to startTime, -1 if not available.
domainLookupEnd
number
Time immediately after the browser ends the domain name lookup for the resource. The value is given in milliseconds relative to startTime, -1 if not available.
connectStart
number
Time immediately before the user agent starts establishing the connection to the server to retrieve the resource. The value is given in milliseconds relative to startTime, -1 if not available.
secureConnectionStart
number
Time immediately before the browser starts the handshake process to secure the current connection. The value is given in milliseconds relative to startTime, -1 if not available.
connectEnd
number
Time immediately after the user agent establishes the connection to the server to retrieve the resource. The value is given in milliseconds relative to startTime, -1 if not available.
requestStart
number
Time immediately before the browser starts requesting the resource from the server, cache, or local resource. The value is given in milliseconds relative to startTime, -1 if not available.
responseStart
number
Time immediately after the browser receives the first byte of the response from the server, cache, or local resource. The value is given in milliseconds relative to startTime, -1 if not available.
responseEnd
number
Time immediately after the browser receives the last byte of the resource or immediately before the transport connection is closed, whichever comes first. The value is given in milliseconds relative to startTime, -1 if not available.