Firebase Hosting very slow after each deploy / on first load

[ro...@passphere.com]

We have found Firebase Hosting to be crazy slow on the first load after a new deployment.

It is in the range of 3-25seconds to load a single asset, this can push our loading times very high after a deployment for our first user in each CDN region.

My belief/guess is this is caused by the CDN having to check, invalidate its cache and re-cache the data.

While is understandable that before it's been cached by a local CDN its slower, the fact that its so slow is unusual.

After we've loaded it once after a new deployment, our load times drop to <300ms for subsequent visitors.

While not a big issue, it is annoying for people who happen to be our first visitor in a CDN region, especially as sometimes as we do multiple deployments a day.

Are there any plans to address this?

[Michael Bleigh]

Is this a consistent problem or did it only happen at a specific time? In general, our origin latency (which will happen after a fresh deploy) is certainly slower than the CDN, but not in the range of 25 seconds to load a single asset. If you're seeing otherwise, especially if you can reliably reproduce the issue, we'd be happy to take a closer look to see what might be wrong.

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[ro...@passphere.com]

We checked this from multiple locations yesterday and were having the issue everywhere (was very noticeable because we were deploying a new and very small static site).

Checking today, we are not having the same issues after deployment. It is only about 100-200ms longer on first load.

I will keep and eye on it, and write here if it comes up again.

Thanks Michael

[Michael Lake]

Seeing this issue as well, although not even after a fresh deploy.

The TTFB was 27 seconds for a simple static image pulled from firebase hosting. was occurring yesterday as well..

[Gurmukh Panesar]

Hello!

I'm noticing this very same problem. I have a newsletter that goes out every few days to the same page but with different url params. The first request with those params takes a very long time. The first request usually results in the following error:

Error 503 first byte timeout

first byte timeout

Subsequent requests are a lot  faster. Is there a way to help debug this issue? I'm getting this problem almost weekly.

The page is super lightweight (1kb) and really shouldn't be causing this problem.

Thanks!

[Michael Bleigh]

To follow up here, this was due to incident: https://status.firebase.google.com/incident/Hosting/18002

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