[1] [CITE@en[Navigation Timing]]
( ([TIME[2012-12-13 06:51:35 +09:00]] 版))
<http://www.w3.org/TR/2012/REC-navigation-timing-20121217/#sec-window.performance-attribute>

[2] [CITE@en[User Timing]]
( ([TIME[2013-12-16 22:17:37 +09:00]] 版))
<https://dvcs.w3.org/hg/webperf/raw-file/default/specs/UserTiming/Overview.html#extensions-performance-interface>