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slightlylate's profile
Alex Russell
Alex Russell
Alex Russell
@slightlylate

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Alex Russell

@slightlylate

Chrome Project 🐡 & Web Standards TL; Blink API OWNER Named PWAs w/ @phae; probably making her ☕ DMs open. Tweets my own; press@google.com for official comms.

San Francisco, The Internet
infrequently.org
Joined December 2010

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    1. Devon Govett‏ @devongovett 28 Nov 2019
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      Replying to @dan_abramov @chofter

      Thanks for the subtweet here. 😉 Yes, traditional client side routing where you replace the whole page seems like a problem. I don’t think it’s insurmountable though. One idea is to eg download the component for article text after initial render (ie on subsequent page loads).

      1 reply 0 retweets 3 likes
    2. Devon Govett‏ @devongovett 28 Nov 2019
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      Replying to @devongovett @dan_abramov @chofter

      Another is to download static HTML from the server even on subsequent page loads and not client render the whole thing, just like on initial page loads!

      1 reply 0 retweets 2 likes
    3. Devon Govett‏ @devongovett 28 Nov 2019
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      Replying to @devongovett @dan_abramov @chofter

      Also I don’t think this is unreasonable. People want to eg write their whole site in React when much of it is static (see eg Gatsby). If that could be optimized to better HTML and JS as if they manually wrote it, that’s a win!

      2 replies 0 retweets 6 likes
    4. Dan Abramov‏ @dan_abramov 28 Nov 2019
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      Replying to @devongovett @chofter

      >One idea is to eg download the component for article text after initial render (ie on subsequent page loads). One way to do it without compromising is to hydrate some parts of the page before the others! Maybe even based on interaction. That's what we do with Concurrent Mode.

      2 replies 0 retweets 5 likes
    5. Devon Govett‏ @devongovett 28 Nov 2019
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      Replying to @dan_abramov @chofter

      Yeah that’s neat. But you’re still downloading unnecessary code. So you are compromising overall performance. This is about finding a balance between client and server rendered parts of a page rather than duplicating work.

      1 reply 0 retweets 1 like
    6. Dan Abramov‏ @dan_abramov 28 Nov 2019
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      Replying to @devongovett @chofter

      It's not unnecessary if you want future fast interactions. It's "code for fast interactions". If you download it too late, you make interactions laggy, negating the point of JS. I agree JS should be non-blocking, but I think calling it unnecessary is a flawed assumption.

      1 reply 0 retweets 4 likes
    7. Devon Govett‏ @devongovett 28 Nov 2019
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      Replying to @dan_abramov @chofter

      Depends on the app of course. Is it faster to download an API response and the whole JS to re-render the page client side on each navigation, or download some pre-rendered HTML and only the interactive JS?

      2 replies 0 retweets 2 likes
    8. Dan Abramov‏ @dan_abramov 28 Nov 2019
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      Replying to @devongovett @chofter

      The assumption here is that JS that makes "static" content interactive (e.g. an article) is large. I think that's rarely the case in practice. As long as it doesn't *block* the initial HTML, I wouldn't worry too much. But!

      2 replies 0 retweets 1 like
    9. Shane O'Sullivan‏ @chofter 28 Nov 2019
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      Replying to @dan_abramov @devongovett

      We’ve recently run into a situation that makes this invalid. Our NextJS site got a bad Lighthouse score for a large bundle because of parse+exec time on slow phones. Then Google stopped serving our ads due to this and business tanked, even though HTML not blocked

      1 reply 0 retweets 2 likes
    10. Tim‏ @timneutkens 28 Nov 2019
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      Replying to @chofter @dan_abramov @devongovett

      Is there anything we can do to help surface this? We already show bundle size statistics when `next build` is ran. On top of that we're working on better bundle splitting: https://nextjs.org/blog/next-9-1#improved-bundle-splitting … Already available: `module.exports = { experimental: { granularChunks: true } }`

      1 reply 1 retweet 7 likes
      Alex Russell‏ @slightlylate 28 Nov 2019
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      Replying to @timneutkens @chofter and

      Perf budgets with reasonable defaults (100K total compressed script, warn; 150, error).

      2:51 PM - 28 Nov 2019
      • 1 Retweet
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      • Tanay Pratap Sibelius Seraphini Wesley Luyten Jonas Kuske Sam Snelling Matija Grcic Shane O'Sullivan Connor Bär 🐼 Tim
      1 reply 1 retweet 9 likes
        1. Shane O'Sullivan‏ @chofter 28 Nov 2019
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          Replying to @slightlylate @timneutkens and

          Also, maintain data on bundle sizes, notify when increased by a large percentage. We missed that pulling in a Dropdown component from a third party added 80kb of gzipped JS (I’m looking at you AntD!)

          0 replies 0 retweets 3 likes
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