Navigation Timing

w3c.github.iosite

This specification defines a unified interface to store and retrieve high resolution performance metric data related to the navigation of a document.

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Web Performance Optimization

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2026-10-10

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1. ▲
   Navigation Timing API (MDN) developer.mozilla.org

   site category #wpo link ↗

   Page navigation and load milestone metrics.

2. ▲
   User Timing w3.org

   site category #wpo link ↗

   This specification defines an interface to help web developers measure the performance of their applications by giving them access to high-precision timestamps.

3. ▲
   Resource Timing w3.org

   site category #wpo link ↗

   This specification defines an interface for web applications to access the complete timing information for resources in a document.

4. ▲
   Performance Timeline w3.org

   site category #wpo link ↗

   This specification defines a unified interface to store and retrieve performance metric data. This specification does not cover individual performance metric interfaces.

5. ▲
   Navigation Timing Level 2 (W3C) w3.org

   site category #wpo link ↗

   Use responseStart and requestStart to derive Time to First Byte (TTFB).

6. ▲
   Resource Timing API (MDN) developer.mozilla.org

   site category #wpo link ↗

   Detailed network timing for assets.

Web Performance Optimization › Specs: “This specification defines a unified interface to store and retrieve high resolution performance metric data related to the navigation of a document.”