[w3c/ServiceWorker] How to get correct connectStart/End values of a proxied http request inside service worker? (Issue #1663)

Our website uses service worker to proxy http requests. When service worker is enabled, the `connectStart` and `connectEnd` values returned by `window.performance` API are always the same as `workerStart`. If we disable service worker, these values become correct, and we can then measure the DNS cost, TCP connection cost.

Image 1, service worker enabled: 

<img width="551" alt="image" src="https://user-images.githubusercontent.com/12378280/203910261-53fdf887-c106-4652-b1be-c5939cdad3e4.png">

Image 2, without service worker:
<img width="510" alt="image" src="https://user-images.githubusercontent.com/12378280/203910924-16711b42-167f-47d5-9d61-b17d42a97261.png">

I find something useful in Chrome Dev Tool. How can I access this timing info in service worker?
<img width="432" alt="image" src="https://user-images.githubusercontent.com/12378280/203912274-3cec1998-099c-419f-ae24-f41c908ac0a5.png">


-- 
Reply to this email directly or view it on GitHub:
https://github.com/w3c/ServiceWorker/issues/1663
You are receiving this because you are subscribed to this thread.

Message ID: <w3c/ServiceWorker/issues/1663@github.com>