First Public Working Drafts: User Timing Level 2 and High Resolution Time Level 3

The Web Performance Working Group has published two Working Drafts:

• User Timing Level 2: This specification defines an interface to help web developers measure the performance of their applications by giving them access to high precision timestamps.
• High Resolution Time Level 3: This specification defines an API that provides the current time in sub-millisecond resolution and such that it is not subject to system clock skew or adjustments.
  by Maria Auday via W3C News