Redirection after authentication is very slow

I’m migrating from Google Identity Toolkit to Firebase Auth and noticed that the redirection to the signInSuccessUrl after successful authentication takes on average 6 secs to complete. The loading bar goes across 3-4 times before the redirection is completed. Is this considered normal? It is significantly slower than the Identity Toolkit.

I also noticed that it is spitting several messages started with Received message: in the browser console while the redirection is taking place. It shouldn’t be logging anything to the console unless it’s running in some kind of debug mode.

Note that I’m currently testing it on localhost. Could that be the reason for seeing those log messages?

[dandv]

I’ve previously reported major slowness when logging in with Twitter, and the problem still persists.

Here’s logging in with Twitter to the Firebase Auth demo:

And here’s logging in with Twitter to Spectrum.chat. Way, way faster:

[nikita-fuchs]

Can confirm waiting times for google login and facebook login of up till 6 seconds.