> AirBnB ...
Maybe not the best example. I think they still have a lot of legacy cruft they need to fix. I still think their homepage/search UX is pretty good. And like someone else said, it's not like 'React' is the cause of slowness.
mobile.twitter.com
For example the search experience: I type something and before the typeaheads show up there is a loding bar on top of them. And when I hit enter, I get a loading spinner in the center of the screen.
Another example: When I click on a tweet and then click the back button. The page where I came from could be shown instantly. Instead I get some type of fade-in effect on some elements.
Etc etc. The whole experience feels terrible clunky on mobile.twitter.com.
Compare that to Googles search for example, where everything feels instant. Typeaheads, result pages ... when I click through to a result and hit the back button - I'm instantly at the same result page where I was before.
Again, this is a really bad generalisation you're making. It is ludicrous to attribute the types of slowness you're talking about to React.
> Compare that to Googles search for example
Do you think it's fair to compare anyone's search to Google's?
Here's some counter-evidence though - https://reactjs.org - that site is built with React and everything is instant.
Also, my own React apps perform instantly and that's because I didn't put in a shitload of JS to do things like track your mouse pointer and do other types of analytics like Twitter probably does.
reactjs.org
In the 'Tutorial' section, everytime I click on an entry on the right, the screen at first jumps up for a fraction of a second before jumping down again.
I just looked at it on like four different devices and didn’t have any problem. It works perfectly for me on Windows 10 with Chrome, Mac High Sierra/Chrome and iOS 11 / Safari iPad and iPhone.
If you don’t believe me, I will post a screen cast on imgur if you’d like.
You can see the jumping on webpagetest.org:
https://www.webpagetest.org/video/compare.php?tests=180616_B...
With a slow connection, on the initial load the first jump happens at 6s and another one at 8.5s.
When I click on one of the links, it happens much faster because everything is cached. But I can still see the jump everytime I click a link to a new section in the tutorial.
I don't think the type of browser plays a role here. I get the glitches on Chrome and Firefox. And testing it on browserling.com shows that they also happen on Internet Explorer.