Facebook used to be reference for speed and usabilityOn web, for a while. Remember when Facebook's iPhone app came out, it was a disaster. It was so slow, I could open the app, then take the elevator down to the basement of my building, drop off some outgoing mail, and return to my apartment before it finished updating the news feed. It was legendary in its time for its slowness.
At first, nobody complained because there weren't a lot of "apps" available. But then all the other apps came out, and everyone complained for years that all the other app-building companies could build responsive apps, but Facebook couldn't.
Then one day Facebook updated its app and it was a little better. Then another update came and it was good enough, and everyone stopped complaining and forgot.
Last day I entered again for curiosity. It's so sad. Strange interface, slow, unresponsive. It's sad.
I only use Facebook once a week, to update the page for a web site I manage. It is terribly slow on web. On both of the computers I use it on, loading the first page takes upwards of 15 seconds. Clicking on the text field to enter a new post takes eight to ten seconds for the editor to load.
I don't know how people who are addicted to Facebook manage to use it so much without going mad.