navigation-timing

navigation-timing copied to clipboard

workerStart and redirects

28

This addresses a few issues around `workerStart` especially in the case of redirects: * `workerStart` needed to be added to the diagram https://github.com/w3c/navigation-timing/issues/128 (see screenshot below) * I've added a...

nicjansma

The "Obsolete" label is rendered in a seemingly random place

12

## Important info - URL to affected spec:https://w3c.github.io/navigation-timing/#dom-performancetiming-redirectend - ReSpec version: 26.8.12 - [x] I did a "hard refresh", but it's still busted. ## Description of problem **What happened?** The...

Krinkle

Extend Navigation Timing API to include back/forward cache NotRestoredReasons

4

In TPAC 2021, we had a positive feedback on reporting back/forward cache NotRestoredReasons extending Navigation Timing API. e.g. Exposing why a page is not restored from back/forward cache in Navigation...

rubberyuzu

Extend 'NavigationType' to include User Agent Launch

13

One of the challenges we've had at Microsoft is measuring the performance impact of a cold start launch for a particular site. This particularly apparent in PWA scenarios where the...

bmathwig

How should prefetch be exposed?

7

We're working on navigational prefetch and think it would be useful for developers to, at a minimum, be able to tell whether the page was prefetched (so they can look...

jeremyroman

Report that Critical-CH was used to restart a navigation

1

Chromium recently [got a report](https://bugs.chromium.org/p/chromium/issues/detail?id=1317666) that it's hard for folks deploying [Critical-CH](https://github.com/WICG/client-hints-infrastructure/blob/main/reliability.md#critical-ch) as a backup mechanism to [ACCEPT_CH](https://github.com/WICG/client-hints-infrastructure/blob/main/reliability.md#accept_ch) frames to know if/when that backup was actually used, and triggered a...

yoavweiss

Detecting whether a navigation was BFCache-eligible

2

In order to produce accurate BFCache hit-rate stats a page must be able to tell whether a navigation was even eligible for BFCache in the first place. Currently there is...

fergald

What should transferSize, encodedBodySize and decodedBodySize in Navigation + Resource Timing represent for responses where a Service Worker is involved?

10

The specifications for [Navigation Timing API 2](https://www.w3.org/TR/navigation-timing-2/) or [Resource Timing API 2](https://www.w3.org/TR/resource-timing-2/) does not make it explicitly clear what is the definition or the expected value to be observed for...

abhishekcghosh

Lack of Feature Parity with Performace.measure() in Level 2

5

From the documentation of Performance.measure(), it seems like the startMark and endMark still depend on PerformanceTiming, which is clearly being depreciated. Is there a way to have it now default...

c3-ThomasHuo

Using navigationStart as a baseline may expose cross-origin timing information

69

When we have a navigation with cross-origin redirects, we're hiding `redirectStart` and `redirectEnd` from the final document. However, because the `timeOrigin` for all the navigation timing entries is the navigation...

noamr