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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. Alex Russell‏ @slightlylate 13 Sep 2018
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      Replying to @tomdale @kristoferbaxter and

      Thanks. I agree a massive change has taken place here and I'm glad to see it. Evidence like this is convincing: https://www.webpagetest.org/video/compare.php?tests=180913_4A_97fde1f7c6cfc56657089645bed79860-r:1-c:0,180913_YC_c0c8e1363bd571286d7c47fd01a44776-r:1-c:0# …

      1 reply 0 retweets 1 like
    2. Alex Russell‏ @slightlylate 13 Sep 2018
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      Replying to @slightlylate @tomdale and

      I don't know that the Glimmer site is actually using SSR here, but the Fastboot one sure is...and that's the style of SSR I'm observing in the wild. It's clearly an anti-pattern.

      1 reply 0 retweets 1 like
    3. Alex Russell‏ @slightlylate 13 Sep 2018
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      Replying to @slightlylate @tomdale and

      Presumably the same ~400K/1.3MB (zipped/unzipped) is loaded/run on the server. That processing blocks getting content to the user while it thinks, and then delays interactivity until the ~13s mark when the code hits the client. This is a static page: https://www.webpagetest.org/video/compare.php?tests=180913_4A_97fde1f7c6cfc56657089645bed79860-r%3A1-c%3A0&thumbSize=200&ival=100&end=visual …

      1 reply 0 retweets 0 likes
    4. Alex Russell‏ @slightlylate 13 Sep 2018
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      Replying to @slightlylate @tomdale and

      It's a good thing browsers implement threaded scrolling, else *nothing* would work in those 5 seconds of red.

      1 reply 0 retweets 0 likes
    5. Alex Russell‏ @slightlylate 13 Sep 2018
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      Replying to @slightlylate @tomdale and

      I don't mean to harp on this to make Fastboot look bad. It's got exactly the same problems as most of the React SSR solutions I've seen deployed. This isn't unique.

      1 reply 0 retweets 0 likes
    6. Tom Dale‏ @tomdale 13 Sep 2018
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      Replying to @slightlylate @kristoferbaxter and

      Yeah, what's running on the FastBoot site is quite old and materially worse than the React SSR implementation. In the LinkedIn feed experiment, we moved to an incremental rehydration model that uses requestIdleCallback to prevent post-JS thread lockup.

      1 reply 0 retweets 1 like
    7. Tom Dale‏ @tomdale 13 Sep 2018
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      Replying to @tomdale @slightlylate and

      In Ember apps today, we still do too much work at runtime, particularly as part of the userland AMD module packaging. Also still too big at ~120kb for emerging markets use cases. But many improvements for both of these issues are in-flight.

      1 reply 0 retweets 3 likes
    8. Alex Russell‏ @slightlylate 13 Sep 2018
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      Replying to @tomdale @kristoferbaxter and

      Glad to hear it. 120KB is the edge of the envelope; not much left in the budget after that: https://infrequently.org/2017/10/can-you-afford-it-real-world-web-performance-budgets/ …

      1 reply 0 retweets 0 likes
    9. Tom Dale‏ @tomdale 13 Sep 2018
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      Replying to @slightlylate @kristoferbaxter and

      Totally agree. We have an awesome team in Bangalore that builds our LinkedIn Lite product that we serve in emerging markets (https://engineering.linkedin.com/blog/2018/03/linkedin-lite--a-lightweight-mobile-web-experience …). Working with them figure out the right constraints to shoot for.

      1 reply 0 retweets 5 likes
    10. Tom Dale‏ @tomdale 13 Sep 2018
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      Replying to @tomdale @slightlylate and

      Tom Dale Retweeted Zach Leatherman

      Oh, one more point on why I think Polymer should be largely disqualified until there is an SSR story in place:https://twitter.com/zachleat/status/1039881142902644736 …

      Tom Dale added,

      Zach Leatherman @zachleat
      Turns out Google does a two-pass indexing and the first pass doesn’t run JavaScript. That’s kind of a big deal. https://twitter.com/Paul_Kinlan/status/1039852756113080320 …
      Show this thread
      1 reply 0 retweets 0 likes
      Alex Russell‏ @slightlylate 13 Sep 2018
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      Replying to @tomdale @kristoferbaxter and

      See, once again, for the umpeenth time, a decent solution for crawlers: https://github.com/GoogleChrome/rendertron …

      10:30 AM - 13 Sep 2018
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        2. Tom Dale‏ @tomdale 13 Sep 2018
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          Replying to @necolas @slightlylate

          Personally, I think there are exciting and unexplored patterns for making SSR UX great by default. I do think it's a design problem more than a technical one. SW helps for consistent users, but sporadic ones? SW likely to have been evicted.

          1 reply 0 retweets 1 like
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        1. Tom Dale‏ @tomdale 13 Sep 2018
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          Replying to @slightlylate @kristoferbaxter and

          That's a lot of operational and architectural complexity to paper over a deficiency in the underlying framework. And much higher resource usage and surface area for attacks. I'd have trouble getting that past SRE and security.

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