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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. Justin Fagnani‏ @justinfagnani 26 Aug 2017
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      Replying to @justinfagnani @_developit and

      What Ryosuke proposes in https://github.com/whatwg/html/issues/2254 … would make it easier to create large DOM trees and directly address the dynamic parts.

      5 replies 5 retweets 21 likes
    2. Tim Branyen‏ @tbranyen 26 Aug 2017
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      Replying to @justinfagnani @_developit and

      This largely ignores how developers use JSX and tagged templates, <template /> improvements isnt what lib authors want... imo of course

      4 replies 0 retweets 9 likes
    3. Justin Fagnani‏ @justinfagnani 26 Aug 2017
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      Replying to @tbranyen @_developit and

      I'm a lib author, and it's what I want. <template> improvements would make a fast and small lit-html even faster and smaller.

      3 replies 1 retweet 7 likes
    4. Justin Fagnani‏ @justinfagnani 26 Aug 2017
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      Replying to @justinfagnani @tbranyen and

      And I don't think it ignores anything. One of the critical jobs of any template system is creating DOM trees and addressing parts of them.

      2 replies 0 retweets 4 likes
    5. Justin Fagnani‏ @justinfagnani 26 Aug 2017
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      Replying to @justinfagnani @tbranyen and

      Right now that typically involves creating a large number of JS wrappers + DOM traversal...

      2 replies 0 retweets 2 likes
    6. Justin Fagnani‏ @justinfagnani 26 Aug 2017
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      Replying to @justinfagnani @tbranyen and

      ...the template extension proposal offers a way to do do that much more efficiently, with less code.

      1 reply 0 retweets 3 likes
    7. Justin Fagnani‏ @justinfagnani 26 Aug 2017
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      Replying to @justinfagnani @tbranyen and

      that can be used as infrastructure for any number of different layers above it.

      1 reply 0 retweets 3 likes
    8. Alex Russell‏ @slightlylate 26 Aug 2017
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      Replying to @justinfagnani @tbranyen and

      Also, can we just talk about vdom overhead for a minute? I'm grateful the marketing dreck about it being "faster" quietly exited stage left

      4 replies 4 retweets 15 likes
    9. Alex Russell‏ @slightlylate 26 Aug 2017
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      Replying to @slightlylate @justinfagnani and

      But we need to all admit that doubling up your data structures & doing work O(num-elements) when changes are smaller is *not fast*

      8 replies 8 retweets 32 likes
    10. Robert Knight‏ @robknight_ 27 Aug 2017
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      Replying to @slightlylate @justinfagnani and

      In theory, the `O(#element)` cost can be significantly reduced using `shouldComponentUpdate` to prune the tree. Not used enough in the wild?

      1 reply 0 retweets 1 like
      Alex Russell‏ @slightlylate 27 Aug 2017
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      Replying to @robknight_ @justinfagnani and

      "VDOM! Now I don't need to manage state updated in my component!*" * please shouldComponentUpdate() responsibly; mobile perf not advertised

      9:24 AM - 27 Aug 2017
      • 1 Retweet
      • 12 Likes
      • Jason Miller 🦊⚛ Steven Beshensky C W Robert Monfera Henning Koch Chris Joel Oliver Addy Osmani Justin Fagnani
      2 replies 1 retweet 12 likes
        1. New conversation
        2. Paul Henschel‏ @0xca0a 28 Aug 2017
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          Replying to @slightlylate @robknight_ and

          No one manually uses sCU, you know that. It's *being* used by HOCs like Redux/Mobx. Allows them to consistently optimize perf.

          2 replies 0 retweets 0 likes
        3. Alex Russell‏ @slightlylate 28 Aug 2017
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          Replying to @0xca0a @robknight_ and

          I know from firsthand experience that's untrue. Every single large-ish React app I've worked on has had to spend days/weeks optimising this.

          7 replies 1 retweet 4 likes
        4. 5 more replies
        1. New conversation
        2. Alex Russell‏ @slightlylate 27 Aug 2017
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          Replying to @slightlylate @robknight_ and

          (objects in devtools may appear cheaper than they are. All warranties apply to desktop-class computers. Caveat emptor.)

          1 reply 0 retweets 6 likes
        3. 1 more reply

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