LuxembourgJS - Web Vitals, Frontend apps analysis in prod

Help, Help me! My web application is dying!
by Nicolas Frizzarin, @Nicooss54

I don't understand. The first page takes a long time to load, some text and image blocks shift others and when the user clicks nothing happens ... :( What's going on ?

It seems that the Core Web Vitals are abandoning my application. In November 2020, Google announced three new signals urging web application creator to take care of the User Experience (UX).

• These three signals come together under the name of Core Web Vitals. But what are these metrics ?
• What do they mean ?
• What are their impacts and how to optimise them ?

This talk will aim to answer these questions, to present metrics tools that allow you to debug easily these signals and also to show the last experimental metrics

Frontend apps analysis in prod
by Rodislav Moldovan @rodislavable

We all need at some point understand what is happening with the application in prod and we all want to have all the possible and impossible details about it.

What if I told you that this is possible.. to a certain extent. You all heard about distributed tracing and Real User Monitoring RUM, but:

• Does it really work ?
• Can we really understand what is happening ?
• Do we have all possible details ?

We'll talk about this particular issues and do a demo.