The W3C User Timing API defines an interface for accessing high precision timestamps that help developers measure the performance of applications. It defines the PerformanceMark and PerformanceMeasure interfaces, as well as extensions to the Performance interface. This is a stable document and may be cited or used as reference material without fear of major alteration.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.