History of Performance.measure() Revision history for: English (US) Aug 10, 2016, 1:54:40 PM jpmedley Previous Aug 10, 2016, 1:54:20 PM jpmedley Previous Mar 1, 2016, 6:38:32 AM rolfedh Previous Dec 17, 2015, 4:11:15 PM stephaniehobson startmark and endMark may also be the name of a PerformanceTiming property Previous Dec 10, 2015, 5:43:41 AM AFBarstow Previous Dec 9, 2015, 6:19:33 PM AFBarstow Dec 9, 2015, 6:18:55 PM AFBarstow New reference page for Performance.measure() (defined by User Timing standard)