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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 Apr 15
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      Replying to @slightlylate @btopro

      Here's the same on a lower device/network: https://www.webpagetest.org/result/200415_QM_aa8a7414b2f21babbdf4d0f945c831aa/ … It's a lot if script, but not enough to justify loading *that* slowly. The serialisation is what's really killing here.

      1 reply 0 retweets 1 like
    2. ${this.bryanOllendyke}‏ @btopro Apr 15
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      Replying to @slightlylate

      def. It'll get better as we keep moving off paper-elements to lit/vanilla/refactor some of our stuff. TTL/PWA settings we disabled as we're in rapid test/deploy. Would modulepreload / preload help in breaking up serialization? expected dynamic import() to do that a bit on its own

      1 reply 0 retweets 0 likes
    3. Alex Russell‏ @slightlylate Apr 15
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      Replying to @btopro

      So the way the PRPL pattern dealt with this was to use H/2 push on a per-route basis to ensure you didn't see this sort of stridation. That worked because the SW was "catching" subsequent top-level navigations to avoid over-push and doing granular caching of assets.

      2 replies 0 retweets 1 like
    4. ${this.bryanOllendyke}‏ @btopro Apr 15
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      Replying to @slightlylate

      was doing h/2 push and read some Gdoc analysis that was it sending assets beyond what we'd need in a request. in this methodology the unbundling lets the dynamic / normal imports resolve the execution as needed. Specific in this app we could modulepreload the known common route.

      1 reply 0 retweets 0 likes
    5. ${this.bryanOllendyke}‏ @btopro Apr 15
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      Replying to @btopro @slightlylate

      we were caching the cdn hits in some earlier builds and while amazing (fully offline then obv) it was making testing nearly impossible. Still running into an issue of attempting to figure out when the assets are new via push / new build avail as weak point for this too

      1 reply 0 retweets 0 likes
    6. ${this.bryanOllendyke}‏ @btopro Apr 15
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      Replying to @btopro @slightlylate

      trying to balance 0 config build / implementation routine w/ apps that could further optimize for performance. Thank you for running through this though I really appreciate it. I've had trouble explaining it to ppl as to why it changes the DX dramatically for front-end newbees

      1 reply 0 retweets 0 likes
    7. Alex Russell‏ @slightlylate Apr 15
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      Replying to @btopro

      So that's what PRPL did that most folks don't grok: it avoids overpushing by never re-requesting the top-level page that triggers pushes in the first place (because of the SW, which can rewrite top-level requests).

      2 replies 0 retweets 1 like
    8. Alex Russell‏ @slightlylate Apr 15
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      Replying to @slightlylate @btopro

      The less aggressive version is some bundling variant, ala @dam'shttps://dev.to/begin/progressive-bundling-1gj2 …

      1 reply 0 retweets 0 likes
    9. Alex Russell‏ @slightlylate Apr 15
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      Replying to @slightlylate @btopro @dam

      A few other things from this trace jump out: 1.) I'm seeing multiple H/2 connection setups to https://cdn.webcomponents.psu.edu/ . Seems like it could collapse to 1? 2.) https://oer.hax.psu.edu/bto108/sites/ist402/files/IMG_20190823_102434%202.jpg … is very big! On a slow link, starving other fetches.

      2 replies 0 retweets 1 like
    10. ${this.bryanOllendyke}‏ @btopro Apr 15
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      Replying to @slightlylate @dam

      ha yes often when testing I skip things that have images as @hey__MP has explored https://github.com/h2non/imaginary  where our users upload media and the FaaS does the compression prior to inserting into the CMS. It's the bizarre world we're walking; self-authoring CMS that acts like a PWA.

      1 reply 0 retweets 0 likes
      Alex Russell‏ @slightlylate Apr 15
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      Replying to @btopro @dam @hey__MP

      Got it. So I think that suggests a more statistical approach is a better bet. What's actually choosing which components and resources to pull in here? Is it just letting the dynamic import()s run?

      9:58 AM - 15 Apr 2020
      1 reply 0 retweets 0 likes
        1. ${this.bryanOllendyke}‏ @btopro Apr 15
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          Replying to @slightlylate @dam @hey__MP

          just running through the imports when things call window.WCAutoload.process(); bootup sets document level MutationObserver + does an initial https://github.com/elmsln/lrnwebcomponents/blob/master/elements/wc-autoload/wc-autoload.js#L37-L42 … querySelectorAll('*') - sanity check for webcomponents (-) and then if in wc-registry.json, import()

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