New York Times Sees 30% Perf Win By Switching To React...18? 

Misleading title. Upgrading from an older version of React to React 18 improved performance.

Typical enterprise: React 19 is out, time to upgrade to React 18

should've just rewritten the whole app in svelte...

In both React 17 and 18 the console.log would run once for all the three state changes. the batching is done internally.

just wanted to note - setImmediate is a node-only function if i remembered correctly

If SEO is the most important thing for you, why on earth would you use react? To make the most living hell situation for the web crawlers you possibly could?

An underrated feature of Theo’s videos is that he doesn’t pollute his videos with random reaction edits every dozen seconds. 👌🏽

Maybe make a video about how Medium being such a pile of garbage with terrible design. And those god-awful ever-loading cheap-looking Github snippets or images they just can seem to pre-load even if you pay for memberships.

Pretty sure you've made a video about this, but I have forgot. What extension are you using that generates code suggestions on every key stroke? I use Copilot but it's so slow at generating suggestions and sometimes doesn't even offer any suggestions.

Why am I watching it while being full time flutter mobile dev?

Wouldn't it be much easier to use astro for all of this? Especially since switching pages in astro could happen nearly instantly without a reload.

16:30 I don't think this is correct. Browsers run appended script tags. There might be something in a framework/library that stops script tags from injecting, or maybe something in browser security context (different domains), but browsers run js in appended script tags. I just did this in dev console and it worked var e = document.createElement('script'); e.text = 'console.log("aaa")'; document.getElementsByTagName('head')[0].appendChild(e);

Nice article. thanks for going through. So they tested or observed performance after it went into production? Also looks like a lot of Browser script hacks teetering on 20 year Browser technology 😁

I had the same exactly issue on script dont run. What i did is just catch all scripts, dont include it, save it somewhere, while retaining the element but adds an id on that element keyvalued with the script. Load the script that is associated on that id only when the page is loaded and found the id.

in general news site doesn't need SPA at all, though if they often create heavily interactive articles that may make some sense

Amazing... React catching up to other frameworks warrants this reaction?

Why don't you have captions on your video? It'd take like 3 extra minutes to run whisper, fix svelte and paste it.

Dude it's the NewYork times. Mostly text and images. They could have just used Astro. Frontend development is all about React. I'm going to the backend.

Man, I saw an exec in there, and I really hope they're not actually using exec in their production code because that's a big cross site scripting vulnerability

20:14 redeclaration of global variables is possible with var, or by setting the global variable on the window object directly, so... ??

I remember amp and now i feel old

the batched setState also happened in react 17. What did I miss?

Someone tell the Economist, their app is screaming garbage.

Batch updates... what a novel concept...

This all makes me think, what's the technical reason not to just make the whole site in Svelte if they are so performance conscious? Besides programmers not wanting to, it looks like the effort they put to make this whole working and luckily getting 30% performance shows how stupid React is with it's actual model of "Re-render unless otherwise". It should be called Reload not React.

All this effort to show the paywall 30% faster.

Chatter @ 1:52 confusing terabytes with terabits, lol

thats pretty cool

I really wish I could like react but it just feels so nasty.

Enzyme is also a horrible name for a React library.

7 views in 1 minute? Bro fell off

just asking does theo have kids and wife 😂😂😂😂

why are we still here developing frontend apps? Just to suffer?

Why not next js ?

you'd love AMP for email :D

*i member gif* AMP

I hated amp!!

Only came on to this vid to say “ your a washed up reaction RU-vidr who has to steal content to stay relevant and only gets 30k views a vid” souls familiar Theo